[transaction] Use the config's metadata tenant when disable multi-tenant metadata

[Demogorgon314]

Motivation

When users disable the KafkaEnableMultiTenantMetadata, we should use the config's metadata tenant as the PulsarTopicProducerStateManagerSnapshotBuffer topic tenant.

Modifications

Use the config's metadata tenant when disable multi-tenant metadata

Documentation

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[codecov]

Codecov Report

Merging #1980 (218a787) into master (e931b6d) will increase coverage by 0.04%.
Report is 1 commits behind head on master.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #1980      +/-   ##
============================================
+ Coverage     17.72%   17.76%   +0.04%     
- Complexity      751      752       +1     
============================================
  Files           195      195              
  Lines         14156    14140      -16     
  Branches       1322     1321       -1     
============================================
+ Hits           2509     2512       +3     
+ Misses        11464    11446      -18     
+ Partials        183      182       -1     

Files Changed	Coverage Δ
...tive/pulsar/handlers/kop/KafkaProtocolHandler.java	0.00% <0.00%> (ø)
...ative/pulsar/handlers/kop/KafkaRequestHandler.java	1.06% <ø> (+<0.01%)	⬆️
...sar/handlers/kop/storage/AppendRecordsContext.java	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes