[Efficient_Metadata_Operations] [DEPENDS_ON PR#2555] Handle purged blobs in store operations.

[ankagrawal]

This PR handles purged blobs for store operations other than purge().

[codecov-commenter]

Codecov Report

Patch coverage: 20.45% and project coverage change: -0.09% ⚠️

Comparison is base (6622e11) 72.51% compared to head (094da9b) 72.43%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2578      +/-   ##
============================================
- Coverage     72.51%   72.43%   -0.09%     
- Complexity    11375    11380       +5     
============================================
  Files           803      803              
  Lines         64660    64744      +84     
  Branches       7897     7909      +12     
============================================
+ Hits          46890    46899       +9     
- Misses        15203    15269      +66     
- Partials       2567     2576       +9     

Files Changed	Coverage Δ
.../github/ambry/notification/NotificationSystem.java	0.00% <ø> (ø)
...ain/java/com/github/ambry/protocol/RequestAPI.java	0.00% <ø> (ø)
...ava/com/github/ambry/cloud/AmbryCloudRequests.java	0.00% <0.00%> (ø)
.../main/java/com/github/ambry/cloud/VcrRequests.java	84.61% <0.00%> (-7.06%)	⬇️
...ithub/ambry/commons/LoggingNotificationSystem.java	47.22% <0.00%> (-2.78%)	⬇️
...n/java/com/github/ambry/protocol/PurgeRequest.java	0.00% <0.00%> (ø)
...in/java/com/github/ambry/server/AmbryRequests.java	71.83% <0.00%> (-3.45%)	⬇️
...rc/main/java/com/github/ambry/store/BlobStore.java	83.94% <0.00%> (-0.93%)	⬇️
...n/java/com/github/ambry/store/PersistentIndex.java	90.28% <33.33%> (-0.21%)	⬇️
...n/java/com/github/ambry/store/StoreErrorCodes.java	100.00% <100.00%> (ø)
... and 3 more

... and 24 files with indirect coverage changes

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