fix: revert "org.opencontainers.referrers.filtersApplied"

[rchincha]

As per latest dist-spec, this is now removed.

What type of PR is this?

Which issue does this PR fix:

What does this PR do / Why do we need it:

If an issue # is not available please add repro steps and logs showing the issue:

Testing done on this change:

Automation added to e2e:

Will this break upgrades or downgrades?

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #1478 (311fda8) into main (9acd19f) will increase coverage by 0.02%.
The diff coverage is 91.90%.

@@            Coverage Diff             @@
##             main    #1478      +/-   ##
==========================================
+ Coverage   90.97%   90.99%   +0.02%     
==========================================
  Files         103      104       +1     
  Lines       22635    22620      -15     
==========================================
- Hits        20592    20583       -9     
+ Misses       1522     1518       -4     
+ Partials      521      519       -2     

Impacted Files	Coverage Δ
pkg/extensions/extension_scrub.go	100.00% <ø> (ø)
pkg/extensions/lint/lint-disabled.go	100.00% <ø> (ø)
pkg/extensions/lint/lint.go	87.50% <ø> (ø)
pkg/extensions/sync/signatures.go	86.86% <ø> (ø)
pkg/meta/repodb/storage_parsing.go	100.00% <ø> (ø)
pkg/test/inject/dev.go	92.30% <ø> (ø)
pkg/test/inject/prod.go	71.42% <ø> (ø)
pkg/test/common.go	84.69% <50.00%> (ø)
pkg/storage/storage.go	89.93% <89.93%> (ø)
pkg/storage/local/local.go	81.96% <97.95%> (-0.02%)	⬇️
... and 13 more

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