GOPROXY + pseudoversions: skip direct lookup fallback when @latest is known

[rarkins]

Describe the proposed change(s).

If GOPROXY is used, and @v/list returns empty for a pseudo version while @latest returns a version, then use that version as the only version in order to skip the fallback to github.com lookups.

Example dependency:

require (
	k8s.io/utils v0.0.0-20230220204549-a5ecb0141aa5
)

https://proxy.golang.org/k8s.io/utils/@latest returns:

{"Version":"v0.0.0-20240423183400-0849a56e8f22","Time":"2024-04-23T18:34:00Z","Origin":{"VCS":"git","URL":"https://github.com/kubernetes/utils","Hash":"0849a56e8f2216ce029590a538a9b50f301a90ae"}}

In such a case there's no need to fall back to looking it up from github.com, instead we can use v0.0.0-20240423183400-0849a56e8f22 as the result.

[renovate-release]

🎉 This issue has been resolved in version 37.327.1 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 37.327.1

Your semantic-release bot 📦🚀