[cleanup][txn] Use MLTransactionMetadataStore in integration tests

[nicoloboschi]

Motivation

Transaction's integration tests use the in memory implementation for the txn metadata store.
Since they're very important test to ensure stability of the transactions feature, it's better to use the default store which is actually designed to run in production environments.

Modifications

• Do not set InMemTransactionMetadataStoreProvider in the integration tests setup

Documentation

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

[codelipenghui]

/pulsarbot run-failure-checks

[codecov-commenter]

Codecov Report

Merging #19140 (f8e48e1) into master (4b8f447) will increase coverage by 0.65%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master   #19140      +/-   ##
============================================
+ Coverage     47.00%   47.65%   +0.65%     
+ Complexity    10639     9582    -1057     
============================================
  Files           713      633      -80     
  Lines         69672    59867    -9805     
  Branches       7482     6236    -1246     
============================================
- Hits          32746    28531    -4215     
+ Misses        33212    28249    -4963     
+ Partials       3714     3087     -627     

Flag	Coverage Δ
unittests	47.65% <ø> (+0.65%)	⬆️

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

Impacted Files	Coverage Δ
...rvice/schema/KeyValueSchemaCompatibilityCheck.java	21.62% <0.00%> (-45.95%)	⬇️
...apache/pulsar/broker/service/TopicListService.java	10.40% <0.00%> (-30.40%)	⬇️
...pulsar/broker/service/PulsarCommandSenderImpl.java	61.73% <0.00%> (-11.74%)	⬇️
...balance/impl/SimpleResourceAllocationPolicies.java	48.57% <0.00%> (-5.72%)	⬇️
.../pulsar/broker/service/BrokerServiceException.java	45.45% <0.00%> (-5.46%)	⬇️
...sar/broker/service/schema/SchemaRegistryStats.java	73.75% <0.00%> (-3.75%)	⬇️
...va/org/apache/pulsar/broker/service/ServerCnx.java	45.92% <0.00%> (-2.25%)	⬇️
...ice/persistent/PersistentMessageExpiryMonitor.java	43.75% <0.00%> (-1.05%)	⬇️
...oker/service/schema/SchemaRegistryServiceImpl.java	65.60% <0.00%> (-0.58%)	⬇️
...ava/org/apache/pulsar/broker/service/Producer.java	58.90% <0.00%> (-0.55%)	⬇️
... and 117 more