Sped up benchmarks

[Cali0707]

Fixes #3320

Proposed Changes

• Only benchmark throughput rather than all modes
• Reduce the number of warmup trials and their runtimes
• Reduce the number of measurement trials
• (bonus: small bugfix to the existing benchmarks for all filter and any filter)

[Cali0707]

/cc @pierDipi @Leo6Leo @matzew

[pierDipi]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[codecov]

Codecov Report

Merging #3401 (7527ece) into main (515c043) will decrease coverage by 0.02%.
Report is 1 commits behind head on main.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #3401      +/-   ##
============================================
- Coverage     61.48%   61.46%   -0.02%     
- Complexity      761      762       +1     
============================================
  Files           181      181              
  Lines         12356    12356              
  Branches        265      265              
============================================
- Hits           7597     7595       -2     
- Misses         4159     4161       +2     
  Partials        600      600              

Flag	Coverage Δ
java-unittests	70.88% <ø> (+0.03%)	⬆️

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see 2 files with indirect coverage changes

[Cali0707]

/test channel-integration-tests-sasl-plain

[Cali0707]

/retest-required