[fix][broker] Remove useless field in the DelayedMessageIndexBucketSegment.proto

[coderzc]

Motivation & Modifications

Remove the useless (not supported)field in the DelayedMessageIndexBucketSegment.proto, It was introduced by PR #20158

Verifying this change

• Make sure that the change passes the CI checks.

(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

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This change is already covered by existing tests, such as (please describe tests).

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This change added tests and can be verified as follows:

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• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Documentation

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Matching PR in forked repository

PR in forked repository:

[codecov-commenter]

Codecov Report

Merging #20166 (5acb348) into master (6036dcc) will decrease coverage by 0.45%.
The diff coverage is 54.54%.

@@             Coverage Diff              @@
##             master   #20166      +/-   ##
============================================
- Coverage     72.93%   72.49%   -0.45%     
+ Complexity    31934     3655   -28279     
============================================
  Files          1868     1868              
  Lines        138449   138458       +9     
  Branches      15235    15235              
============================================
- Hits         100978   100372     -606     
- Misses        29438    30040     +602     
- Partials       8033     8046      +13     

Flag	Coverage Δ
inttests	24.34% <0.00%> (+0.23%)	⬆️
systests	24.84% <0.00%> (-0.10%)	⬇️
unittests	71.75% <54.54%> (-0.46%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../apache/pulsar/metadata/impl/ZKSessionWatcher.java	97.14% <ø> (ø)
...pulsar/broker/admin/impl/PersistentTopicsBase.java	64.15% <33.33%> (-0.25%)	⬇️
...mon/policies/data/stats/SubscriptionStatsImpl.java	69.91% <50.00%> (-0.74%)	⬇️
...ensions/strategy/LeastResourceUsageWithWeight.java	76.66% <100.00%> (ø)
...ava/org/apache/pulsar/common/naming/TopicName.java	96.33% <100.00%> (ø)

... and 117 files with indirect coverage changes