feat: removed new trigger filters feature flag

[Cali0707]

As part of moving the new trigger filters feature to GA, this PR removes the feature flag

Proposed Changes

• Remove the feature flag

Release Note

The new-trigger-filters feature flag has been removed, and the feature is now GA.

Docs

[Cali0707]

/cc @pierDipi @creydr @matzew

/hold until the CE SDKs are updated

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 52.83%. Comparing base (d0df87a) to head (709015b).
Report is 17 commits behind head on main.

Files	Patch %	Lines
control-plane/pkg/reconciler/consumer/consumer.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3963      +/-   ##
============================================
+ Coverage     48.24%   52.83%   +4.59%     
- Complexity        0      856     +856     
============================================
  Files           246      344      +98     
  Lines         14500    17892    +3392     
  Branches          0      295     +295     
============================================
+ Hits           6995     9454    +2459     
- Misses         6799     7557     +758     
- Partials        706      881     +175     

Flag	Coverage Δ
java-unittests	72.53% <ø> (?)

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[Cali0707]

/retest-required

[matzew]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, matzew

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• OWNERS [Cali0707,matzew]

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[Cali0707]

/unhold

[Cali0707]

/retest-required