Add CV user guide page

[SarahFrench]

Adding user guide

Release Note Template for Downstream PRs (will be copied)

[SarahFrench]

@megan07 this URL https://registry.terraform.io/providers/hashicorp/google/latest/docs/guides/common_issues is made from the file name of mmv1/third_party/terraform/website/docs/guides/common_issues.html.markdown.

I need to ensure the guide from this PR has the URL https://registry.terraform.io/providers/hashicorp/google/latest/docs/guides/google-continuous-validation so I named the file in this PR to match that URL.

That seem ok? 😬

[megan07]

Looks good! Thanks!

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 1 file changed, 223 insertions(+))
Terraform Beta: Diff ( 1 file changed, 223 insertions(+))
TF Conversion: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))