feat: Support basic auth and bearer auth login to registry

[tosone]

Summary

In some scenarios, user wants to login the registry in oneline command. trivy can be used like this: trivy image --registry-token xx image

Release Note

Support basic auth and bearer auth login to registry

[tosone]

@haydentherapper Could you please review this pr?

[codecov]

Codecov Report

Merging #3310 (e111ed9) into main (e92f0a3) will decrease coverage by 0.04%.
Report is 16 commits behind head on main.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #3310      +/-   ##
==========================================
- Coverage   30.65%   30.61%   -0.04%     
==========================================
  Files         155      155              
  Lines        9994    10007      +13     
==========================================
  Hits         3064     3064              
- Misses       6474     6487      +13     
  Partials      456      456              

Files	Coverage Δ
cmd/cosign/cli/options/registry.go	0.00% <0.00%> (ø)

[cpanato]

it lgtm
but wondering if we can rely on the existing auth like when you do docker login ...

[tosone]

Yes, github.com/google/go-containerregistry can read the auth info from docker login, but in some scenarios, I have no the basic auth(username/password) info, only the bearer token, gcr(github.com/google/go-containerregistry) also supports bearer token access registry.
I have some code snippets that need this feat. https://github.com/go-sigma/sigma/blob/main/pkg/signing/cosign/sign/sign.go#L82

[tosone]

@haydentherapper gently ping.