Require new bundle format for image signing and verification

[aaronlew02]

Summary

Release Note

Documentation

[codecov]

Codecov Report

❌ Patch coverage is 53.70920% with 156 lines in your changes missing coverage. Please review.
✅ Project coverage is 41.24%. Comparing base (2ef6022) to head (64ca751).
⚠️ Report is 830 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/cosign/cli/attest_blob.go	34.61%	17 Missing ⚠️
cmd/cosign/cli/verify/verify_blob_attestation.go	63.15%	7 Missing and 7 partials ⚠️
cmd/cosign/cli/sign.go	27.77%	12 Missing and 1 partial ⚠️
cmd/cosign/cli/signblob.go	47.82%	12 Missing ⚠️
cmd/cosign/cli/signcommon/common.go	87.09%	11 Missing and 1 partial ⚠️
cmd/cosign/cli/verify/verify.go	42.10%	10 Missing and 1 partial ⚠️
cmd/cosign/cli/attest.go	0.00%	9 Missing and 1 partial ⚠️
cmd/cosign/cli/verify/common.go	56.52%	8 Missing and 2 partials ⚠️
cmd/cosign/cli/sign/sign_blob.go	35.71%	7 Missing and 2 partials ⚠️
cmd/cosign/cli/sign/sign.go	0.00%	8 Missing ⚠️
... and 11 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5093      +/-   ##
==========================================
+ Coverage   40.10%   41.24%   +1.14%     
==========================================
  Files         155      207      +52     
  Lines       10044    12389    +2345     
==========================================
+ Hits         4028     5110    +1082     
- Misses       5530     6612    +1082     
- Partials      486      667     +181     

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