Require new bundle format for attest-blob

[aaronlew02]

Summary

Release Note

Documentation

[codecov]

Codecov Report

❌ Patch coverage is 55.26316% with 119 lines in your changes missing coverage. Please review.
✅ Project coverage is 40.47%. Comparing base (2ef6022) to head (197a0d5).
⚠️ 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/signblob.go	47.82%	12 Missing ⚠️
cmd/cosign/cli/signcommon/common.go	87.09%	11 Missing and 1 partial ⚠️
cmd/cosign/cli/attest.go	0.00%	9 Missing and 1 partial ⚠️
cmd/cosign/cli/sign/sign.go	0.00%	10 Missing ⚠️
cmd/cosign/cli/verify/common.go	61.53%	8 Missing and 2 partials ⚠️
cmd/cosign/cli/sign.go	0.00%	8 Missing and 1 partial ⚠️
cmd/cosign/cli/sign/sign_blob.go	35.71%	7 Missing and 2 partials ⚠️
cmd/cosign/cli/attest/attest.go	0.00%	5 Missing ⚠️
cmd/cosign/cli/options/attest.go	0.00%	4 Missing ⚠️
... and 7 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5088      +/-   ##
==========================================
+ Coverage   40.10%   40.47%   +0.36%     
==========================================
  Files         155      207      +52     
  Lines       10044    12809    +2765     
==========================================
+ Hits         4028     5184    +1156     
- Misses       5530     6932    +1402     
- Partials      486      693     +207     

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