feat: pack: add git tag to builtin_actors_gen

[snissn]

Related Issues

#10185

Proposed Changes

Pass git tag from pack.sh to builtin_actors through the makefile and add BundleGitTag to builtin_actors_gen.go

Additional Info

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[arajasek]

Thanks for the PR, this works well!

The only catch here is that invoking bundle-gen without the new RELEASE input will blow away the BundleGitTag previously set.

I think this is fine -- this value will only get set through the pack.sh script. The only caveat is that bundle-gen is currently invoked by make gen, a command we regularly invoke to generate other auto-generated matter (like documentation). I think the correct think to do is to just drop bundle-gen from being part of gen entirely -- it's not actually useful today anyway.

(doing so will also fix the CI failure)

[snissn]

Thanks @arajasek I pushed a commit that removes bundle-gen from make gen!