Fix thread safety issues with SDF (WIP)

[saurabhd336]

SimpleDateFormat is not thread safe. Moving to DateTimeFormatter wherever SDF's instances were being shared b/w threads

[codecov-commenter]

Codecov Report

Merging #9425 (8f25c3a) into master (2d6665b) will increase coverage by 0.03%.
The diff coverage is 90.00%.

@@             Coverage Diff              @@
##             master    #9425      +/-   ##
============================================
+ Coverage     69.73%   69.77%   +0.03%     
+ Complexity     4787     4710      -77     
============================================
  Files          1890     1890              
  Lines        100756   100755       -1     
  Branches      15350    15350              
============================================
+ Hits          70266    70300      +34     
+ Misses        25507    25456      -51     
- Partials       4983     4999      +16     

Flag	Coverage Δ
integration1	26.03% <20.00%> (+<0.01%)	⬆️
integration2	24.69% <20.00%> (-0.01%)	⬇️
unittests1	66.99% <100.00%> (-0.02%)	⬇️
unittests2	15.38% <20.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ntroller/helix/core/PinotHelixResourceManager.java	71.69% <66.66%> (-0.12%)	⬇️
...a/org/apache/pinot/common/utils/DateTimeUtils.java	100.00% <100.00%> (ø)
...rg/apache/pinot/spi/utils/GroovyTemplateUtils.java	86.95% <100.00%> (ø)
...ntroller/helix/core/minion/TaskMetricsEmitter.java	34.88% <0.00%> (-51.17%)	⬇️
...he/pinot/segment/local/segment/store/IndexKey.java	65.00% <0.00%> (-15.00%)	⬇️
...ore/query/scheduler/resources/ResourceManager.java	84.00% <0.00%> (-12.00%)	⬇️
...or/transform/function/IsNullTransformFunction.java	78.57% <0.00%> (-7.15%)	⬇️
...tream/kafka20/server/KafkaDataServerStartable.java	72.91% <0.00%> (-6.25%)	⬇️
.../pinot/core/query/scheduler/PriorityScheduler.java	77.77% <0.00%> (-5.56%)	⬇️
...lter/predicate/NotInPredicateEvaluatorFactory.java	78.35% <0.00%> (-4.48%)	⬇️
... and 24 more

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[Jackie-Jiang]

Good catch!