Enable TypeScript support by default

[andrewslotin]

Feature Description

k6 v0.52.0 introduced experimental support for TypeScript as an opt-in feature. To enable this, users must specify experimental_enhanced as a compatibility mode when running the k6 run command.

After six months, this feature can now be regarded as stable and is set as the default for executing scripts. In contrast, the current default extended mode is available as an opt-out option.

Suggested Solution (optional)

Drop the experimental_ prefix from the mode name and use it as the new default for --compatibility-mode/K6_COMPATIBILITY_MODE option, i.e. --comaptibility-mode=enhanced.

Already existing or connected issues / PRs (optional)

• Native TypeScript support #3703
• TypeScript and ES6+ support using esbuild. #3738