Add check-latest version tunable to allow caching with refresh on specific major revision or major + minor

[jerome-benoit]

Currently the only way to ensure during CI you get the latest version from a major revision using wildcard version like 1.x (or 1.1.x
for major + minor version pinning) is to disable caching, which is not friendly to the bun download infra, etc.

check-latest would allow to:

• use bun runtime cache
• download bun runtime, prune and refresh bun runtime cache only if a new version in a major revision (or ...) is available

Setting version to latest is not offering a similar granularity over the version control at CI on GitHub.