fix: go backend can't install tools without 'v' prefix in git repo tags

[roele]

@jdx The infamous v prefix topic again. While general go module convention is to use v prefix there are several modules around without. Since versions can not be easily queried (for example via curl HEAD request) one approach i can think of handling this is a simple retry.

Fixes #2593

[sgtsquiggs]

Consider reverting this PR:

❯ mise install go:golang.org/x/tools/cmd/stringer@v0.21.0
mise versions should not start with a 'v', please remove it
mise Run with --verbose or MISE_VERBOSE=1 for more information

This is a breaking change!

[jdx]

the go backend is experimental so breaking changes should be expected