Add log for delete table API

[jackjlli]

This PR adds logs for deleteTable API. We've seen this API taking too much time to proceed. Adding logs helps to track which part is the bottle neck.

[codecov-io]

Codecov Report

Merging #3763 into master will increase coverage by 0.08%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #3763      +/-   ##
============================================
+ Coverage     67.09%   67.17%   +0.08%     
  Complexity        4        4              
============================================
  Files          1027     1027              
  Lines         50799    50814      +15     
  Branches       7091     7091              
============================================
+ Hits          34082    34135      +53     
+ Misses        14400    14350      -50     
- Partials       2317     2329      +12

Impacted Files	Coverage Δ	Complexity Δ
...ntroller/helix/core/PinotHelixResourceManager.java	60.79% <100%> (+0.63%)	0 <0> (ø)	⬇️
...a/manager/realtime/RealtimeSegmentDataManager.java	50% <0%> (-50%)	0% <0%> (ø)
...lix/EmptyBrokerOnlineOfflineStateModelFactory.java	86.66% <0%> (-13.34%)	0% <0%> (ø)
...pinot/core/operator/docidsets/OrBlockDocIdSet.java	84.9% <0%> (-13.21%)	0% <0%> (ø)
.../impl/dictionary/LongOffHeapMutableDictionary.java	81.81% <0%> (-10.91%)	0% <0%> (ø)
.../BrokerResourceOnlineOfflineStateModelFactory.java	49.15% <0%> (-10.17%)	0% <0%> (ø)
...impl/dictionary/DoubleOnHeapMutableDictionary.java	68.88% <0%> (-6.67%)	0% <0%> (ø)
.../impl/dictionary/FloatOnHeapMutableDictionary.java	86.66% <0%> (-6.67%)	0% <0%> (ø)
...e/operator/dociditerators/SortedDocIdIterator.java	61.11% <0%> (-2.78%)	0% <0%> (ø)
...va/org/apache/pinot/common/data/TimeFieldSpec.java	91.35% <0%> (-1.24%)	0% <0%> (ø)
... and 21 more

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[mcvsubbu]

Please make sure that the table name (with type) is there in all the tables. Time is not necessary, since the log message should indicate the time of log.
I would format the message something like this:
"Deleting table {}: Start"
"Deleting table {} : Removed from broker idealstate"
"Deleting table {} : SOMETHNG ELSE"
etc.
"Deleting table {}: Done"
so that we can just look for the table that we want, and get all the deletion logs.

[jackjlli]

@mcvsubbu Comment addressed

[mcvsubbu]

why do we need the time in each log/? The log line provides a msec time.