[ISSUE #5020] Add find_java_home function to tool script

[Slideee]

Make sure set the target branch to develop

What is the purpose of the change

#5020

Brief changelog

XX

Verifying this change

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[codecov-commenter]

Codecov Report

Merging #5024 (79bc3c4) into develop (f1e95cd) will decrease coverage by 0.01%. The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #5024      +/-   ##
=============================================
- Coverage      43.22%   43.21%   -0.02%     
+ Complexity      7766     7760       -6     
=============================================
  Files            995      995              
  Lines          69101    69101              
  Branches        9154     9154              
=============================================
- Hits           29870    29861       -9     
- Misses         35479    35485       +6     
- Partials        3752     3755       +3     

Impacted Files	Coverage Δ
...apache/rocketmq/remoting/netty/ResponseFuture.java	79.59% <0.00%> (-2.05%)	:arrow_down:
...org/apache/rocketmq/common/stats/StatsItemSet.java	41.79% <0.00%> (-1.50%)	:arrow_down:
...rocketmq/remoting/netty/NettyRemotingAbstract.java	51.44% <0.00%> (-1.45%)	:arrow_down:
...mq/client/impl/consumer/RebalanceLitePullImpl.java	69.86% <0.00%> (-1.37%)	:arrow_down:
...ache/rocketmq/broker/client/ConsumerGroupInfo.java	68.46% <0.00%> (-0.91%)	:arrow_down:
.../org/apache/rocketmq/store/ha/DefaultHAClient.java	61.53% <0.00%> (-0.52%)	:arrow_down:
...he/rocketmq/client/trace/AsyncTraceDispatcher.java	82.85% <0.00%> (-0.48%)	:arrow_down:
...he/rocketmq/client/impl/consumer/ProcessQueue.java	61.92% <0.00%> (-0.46%)	:arrow_down:
...cketmq/broker/processor/PopBufferMergeService.java	37.44% <0.00%> (-0.24%)	:arrow_down:
...ent/impl/consumer/DefaultLitePullConsumerImpl.java	69.21% <0.00%> (-0.16%)	:arrow_down:
... and 6 more

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[Slideee]

@RongtongJin Hi, can this PR be merged?