[Enhancement] - Show free tiers in region lists

[clun]

Reported by @synedra

When list of available regions for DB and STREAMING is displayed we should mark the one is free tier

+----------------+-------------------------+------------------------------------+
| Cloud Provider | Region                  | Full Name                          |
+----------------+-------------------------+------------------------------------+
| aws            | ap-east-1               | Asia Pacific (Hong Kong)           |
| aws            | ap-south-1              | Asia Pacific (Mumbai)              |
| aws            | ap-southeast-1          | Asia Pacific (Singapore)           |
| aws            | ap-southeast-2          | Asia Pacific (Sydney)              |
| aws            | eu-central-1            | Europe (Frankfurt)                 |
| aws            | eu-west-1               | Europe (Ireland)                   |
| aws            | sa-east-1               | South America (Sao Paulo)          |
| aws            | us-east-1               | US East (N. Virginia)              |
| aws            | us-east-2               | US East (Ohio)                     |
| aws            | us-west-2               | US West (Oregon)                   |
| azure          | australiaeast           | Australia East                     |
| azure          | canadacentral           | Canada Central (Toronto)           |
| azure          | centralindia            | Central India (Pune)               |
| azure          | eastus                  | US East                            |
| azure          | eastus2                 | US East 2 (Virginia)               |
| azure          | francecentral           | France Central                     |
| azure          | westeurope              | West Europe                        |
| azure          | westus2                 | US West (Washington)               |
| gcp            | asia-east2              | Asia East2 (Hong Kong, APAC)       |
| gcp            | asia-northeast1         | Asia Northeast1 (Tokyo, Japan)     |
| gcp            | asia-south1             | Mumbai, India                      |
| gcp            | australia-southeast1    | Sydney, Australia, APAC            |
| gcp            | europe-west1            | St. Ghislain, Belgium              |
| gcp            | europe-west2            | West Europe2 (London, England, UK) |
| gcp            | northamerica-northeast1 | Montreal, Quebec                   |
| gcp            | northamerica-northeast2 | Toronto, Ontario                   |
| gcp            | us-central1             | Council Bluffs, Iowa               |
| gcp(FREE-TIER) | us-east1                | Moncks Corner, South Carolina      |
| gcp            | us-east4                | Ashburn, Virginia                  |
| gcp            | us-west1                | The Dalles, Oregon                 |
| gcp            | us-west4                | US West (Las Vegas, USA)           |
+----------------+-------------------------+------------------------------------+

[clun]

Sample output as of 0.4

+-----------------+-------------------------+---------------------------------------+
| Cloud Provider  | Region                  | Full Name                             |
+-----------------+-------------------------+---------------------------------------+
| aws             | ap-east-1               | Asia Pacific (Hong Kong)              |
| aws             | ap-south-1              | Asia Pacific (Mumbai)                 |
| aws             | ap-southeast-1          | Asia Pacific (Singapore)              |
| aws             | ap-southeast-2          | Asia Pacific (Sydney)                 |
| aws             | eu-central-1            | Europe (Frankfurt)                    |
| aws             | eu-west-1               | Europe (Ireland)                      |
| aws             | eu-west-2               | Europe (London)                       |
| aws             | sa-east-1               | South America (Sao Paulo)             |
| aws             | us-east-1               | US East (N. Virginia)                 |
| aws             | us-east-2               | US East (Ohio)                        |
| aws             | us-west-2               | US West (Oregon)                      |
| azure           | australiaeast           | Australia East                        |
| azure           | canadacentral           | Canada Central (Toronto)              |
| azure           | centralindia            | Central India (Pune)                  |
| azure           | eastus                  | US East                               |
| azure           | eastus2                 | US East 2 (Virginia)                  |
| azure           | francecentral           | France Central                        |
| azure           | westeurope              | West Europe                           |
| azure           | westus2                 | US West (Washington)                  |
| gcp             | asia-northeast1         | Asia Northeast1 (Tokyo, Japan)        |
| gcp             | asia-south1             | Mumbai, India                         |
| gcp             | australia-southeast1    | Sydney, Australia, APAC               |
| gcp             | europe-west1            | St. Ghislain, Belgium                 |
| gcp             | europe-west2            | West Europe2 (London, England, UK)    |
| gcp             | europe-west3            | West Europe3 (Frankfurt, Germany)     |
| gcp             | europe-west4            | West Europe4 (Eemshaven, Netherlands) |
| gcp             | northamerica-northeast1 | Montreal, Quebec                      |
| gcp             | northamerica-northeast2 | Toronto, Ontario                      |
| gcp             | us-central1             | Council Bluffs, Iowa                  |
| gcp (free-tier) | us-east1                | Moncks Corner, South Carolina         |
| gcp             | us-east4                | Ashburn, Virginia                     |
| gcp             | us-west1                | The Dalles, Oregon                    |
| gcp             | us-west4                | US West (Las Vegas, USA)              |
+-----------------+-------------------------+---------------------------------------+