[transactions] Implement KIP-664 - DESCRIBE_TRANSACTIONS

[gaoran10]

This PR needs #1984.

Motivation

Implement KIP-664 - DESCRIBE_TRANSACTIONS.

Modifications

Handle the command DESCRIBE_TRANSACTIONS.

Documentation

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Need to update docs?

• doc-required

  (If you need help on updating docs, create a doc issue)

• no-need-doc

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• doc

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[github-actions]

@gaoran10:Thanks for your contribution. For this PR, do we need to update docs?
(The PR template contains info about doc, which helps others know more about the changes. Can you provide doc-related info in this and future PR descriptions? Thanks)

[github-actions]

@gaoran10:Thanks for your contribution. For this PR, do we need to update docs?
(The PR template contains info about doc, which helps others know more about the changes. Can you provide doc-related info in this and future PR descriptions? Thanks)

[github-actions]

@gaoran10:Thanks for your contribution. For this PR, do we need to update docs?
(The PR template contains info about doc, which helps others know more about the changes. Can you provide doc-related info in this and future PR descriptions? Thanks)

[codecov]

Codecov Report

Merging #1985 (6108953) into master (26980a3) will decrease coverage by 0.15%.
Report is 1 commits behind head on master.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #1985      +/-   ##
============================================
- Coverage     17.05%   16.91%   -0.15%     
  Complexity      728      728              
============================================
  Files           191      191              
  Lines         14235    14357     +122     
  Branches       1332     1351      +19     
============================================
  Hits           2428     2428              
- Misses        11631    11753     +122     
  Partials        176      176              

Files Changed	Coverage Δ
...ative/pulsar/handlers/kop/KafkaCommandDecoder.java	0.30% <0.00%> (-0.01%)	⬇️
...ative/pulsar/handlers/kop/KafkaRequestHandler.java	0.99% <0.00%> (-0.01%)	⬇️
...e/pulsar/handlers/kop/KafkaTopicLookupService.java	1.92% <0.00%> (-0.04%)	⬇️
...ndlers/kop/coordinator/group/GroupCoordinator.java	0.00% <0.00%> (ø)
...oordinator/transaction/TransactionCoordinator.java	0.00% <0.00%> (ø)
.../kop/coordinator/transaction/TransactionState.java	0.00% <0.00%> (ø)
...ordinator/transaction/TransactionStateManager.java	0.00% <0.00%> (ø)
.../pulsar/handlers/kop/utils/KafkaResponseUtils.java	0.00% <0.00%> (ø)