feat(cloudflare): Automatically set the release id when CF_VERSION_METADATA is enabled

[github-actions]

Note

The pull request "feat(cloudflare): Automatically set the release id when CF_VERSION_METADATA is enabled" was created by @JPeer264 but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

The CF_VERSION_METADATA only has one reason - to add the release id.

Since we already set the release when SENTRY_RELEASE is enabled automatically, we can do the same for CF_VERSION_METADATA. The docs will then also be updated to state how the release id can be set in different ways: getsentry/sentry-docs#16006

[linear]

JS-1489

[github-actions]

A PR closing this issue has just been released 🚀

This issue was referenced by PR #18855, which was included in the 10.35.0 release.