Fix for Generic error for persistent task on starting replication

[nisgoel-amazon]

Description

This change will fix the generic error coming in case of replication failed in restore phase.
This change will also return the acknowledgement as 200 when replication failed in restore phase and put the failed reason in metadata store, which can be view via replication status API

Issues Resolved

#707

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

Merging #1002 (a67ab40) into main (59b5543) will decrease coverage by 0.32%.
The diff coverage is 54.90%.

❗ Current head a67ab40 differs from pull request most recent head 78f6c24. Consider uploading reports for the commit 78f6c24 to get more accurate results

@@             Coverage Diff              @@
##               main    #1002      +/-   ##
============================================
- Coverage     73.22%   72.91%   -0.32%     
- Complexity     1010     1018       +8     
============================================
  Files           141      141              
  Lines          4699     4740      +41     
  Branches        527      536       +9     
============================================
+ Hits           3441     3456      +15     
- Misses          933      949      +16     
- Partials        325      335      +10     

Impacted Files	Coverage Δ
...rch/replication/task/index/IndexReplicationTask.kt	68.13% <25.00%> (+0.41%)	⬆️
...action/stop/TransportStopIndexReplicationAction.kt	56.12% <36.84%> (-4.64%)	⬇️
...TransportReplicateIndexClusterManagerNodeAction.kt	91.66% <50.00%> (-1.56%)	⬇️
...ication/seqno/RemoteClusterRetentionLeaseHelper.kt	70.43% <69.56%> (+7.16%)	⬆️
...on/repository/RemoteClusterRestoreLeaderService.kt	78.37% <100.00%> (ø)
...rch/replication/task/shard/ShardReplicationTask.kt	76.81% <100.00%> (+0.89%)	⬆️

... and 2 files with indirect coverage changes