[fix][broker] fix can not cleanup heartbeat data if scaling down broker

[TakaHiR07]

Main Issue: #21324

Motivation

Fix can not cleanup heartbeat data if scaling down broker

Modifications

when close the broker, delete heartbeat resource.

If the broker restart, the heartbeat resource would be recreate.

Verifying this change

• [] Make sure that the change passes the CI checks.

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

Matching PR in forked repository

PR in forked repository: TakaHiR07#21

[lhotari]

LGTM. Good work!

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 89.28571% with 3 lines in your changes missing coverage. Please review.

Project coverage is 70.97%. Comparing base (bbc6224) to head (20f3895).
Report is 1187 commits behind head on master.

Files with missing lines	Patch %	Lines
...n/java/org/apache/pulsar/broker/PulsarService.java	90.47%	0 Missing and 2 partials ⚠️
...g/apache/pulsar/broker/admin/impl/BrokersBase.java	85.71%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #22750      +/-   ##
============================================
- Coverage     73.57%   70.97%   -2.60%     
+ Complexity    32624     4229   -28395     
============================================
  Files          1877     1891      +14     
  Lines        139502   148710    +9208     
  Branches      15299    16554    +1255     
============================================
+ Hits         102638   105548    +2910     
- Misses        28908    34959    +6051     
- Partials       7956     8203     +247     

Flag	Coverage Δ
inttests	27.41% <35.71%> (+2.82%)	⬆️
systests	24.68% <3.57%> (+0.36%)	⬆️
unittests	72.23% <91.66%> (-0.61%)	⬇️

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

Files with missing lines	Coverage Δ
...g/apache/pulsar/broker/admin/impl/BrokersBase.java	67.67% <85.71%> (-4.79%)	⬇️
...n/java/org/apache/pulsar/broker/PulsarService.java	83.08% <90.47%> (+0.70%)	⬆️

... and 376 files with indirect coverage changes

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