Integrate Azure storage v12 into AzureCloudDestination

[lightningrob]

Also remove unused CloudDestination.doesBlobExist()

[codecov-io]

Codecov Report

Merging #1324 into master will decrease coverage by 0.02%.
The diff coverage is 73.84%.

@@             Coverage Diff              @@
##             master    #1324      +/-   ##
============================================
- Coverage     72.15%   72.12%   -0.03%     
+ Complexity     6498     6496       -2     
============================================
  Files           472      472              
  Lines         37265    37204      -61     
  Branches       4707     4703       -4     
============================================
- Hits          26888    26835      -53     
+ Misses         9124     9118       -6     
+ Partials       1253     1251       -2

Impacted Files	Coverage Δ	Complexity Δ
...ithub.ambry.cloud/azure/AzureBlobDataAccessor.java	80.29% <72.91%> (+1.2%)	20 <8> (+8)	⬆️
...ithub.ambry.cloud/azure/AzureCloudDestination.java	70% <76.47%> (-3.89%)	29 <1> (-10)
...java/com.github.ambry.store/CompactionManager.java	89.88% <0%> (-1.79%)	25% <0%> (ø)
.../main/java/com.github.ambry.store/ScanResults.java	81.25% <0%> (-1.57%)	16% <0%> (-1%)
...java/com.github.ambry.network/SSLTransmission.java	70.46% <0%> (-0.93%)	76% <0%> (ø)
...in/java/com.github.ambry.store/BlobStoreStats.java	71.25% <0%> (-0.63%)	104% <0%> (-1%)
...ls/src/main/java/com.github.ambry.utils/Utils.java	76.56% <0%> (-0.34%)	113% <0%> (-1%)
...ain/java/com.github.ambry.router/PutOperation.java	91.8% <0%> (ø)	114% <0%> (ø)	⬇️
...rc/main/java/com.github.ambry.store/BlobStore.java	89.77% <0%> (+0.22%)	100% <0%> (+1%)	⬆️
... and 4 more

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[ankagrawal]

lgtm.
Do remember to run AzureIntegrationTest before checking in.

[cgtz]

LGTM after addressing these comments.

[cgtz]

storageConfiguration appears to now be empty. does it still have to be passed into the builder?

[lightningrob]

I originally was setting something in it and removed it. Figured I'd keep it as a placeholder in case we need it later.

[cgtz]

thanks for finding this option!

[lightningrob]

I couldn't find a way to really customize it and error out on specific things, it's basically all or nothing so I chose nothing to cut down the noise.