refactor: use buildinfo to get opa and frameworks version

[sozercan]

What this PR does / why we need it:

• Uses buildinfo to bake in opa and frameworks version so these will be visible in gator installed from homebrew. Unfortunately, we cannot do this for tag since Go doesn't support that (since tags are mutable?), so we have to keep LDFLAGS for version.
• Printing OPA version inside manager too since we are getting questions about this
• Fixes version bug that we missed to add /v3

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):
Fixes #2534

Special notes for your reviewer:

[sozercan]

Homebrew/homebrew-core#139343 fixes the go mod change on brew side

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.09% ⚠️

Comparison is base (cf867d1) 53.14% compared to head (1fe0d79) 53.05%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2950      +/-   ##
==========================================
- Coverage   53.14%   53.05%   -0.09%     
==========================================
  Files         135      135              
  Lines       11806    11806              
==========================================
- Hits         6274     6264      -10     
- Misses       5047     5054       +7     
- Partials      485      488       +3     

Flag	Coverage Δ
unittests	53.05% <ø> (-0.09%)	⬇️

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see 2 files with indirect coverage changes

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[maxsmythe]

LGTM

[ritazh]

LGTM