add query option of disabling upsert during query

[yupeng9]

Description

Part of a series of PRs for #4261
Check this doc out for the new design

Add a query option for skipping upsert (mostly for debugging purpose)

select event_id, count(*) from meetupRsvp option(skipUpsert=true) group by event_id limit 10

displays:

[codecov-io]

Codecov Report

Merging #6141 into master will increase coverage by 6.34%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master    #6141      +/-   ##
==========================================
+ Coverage   66.44%   72.78%   +6.34%     
==========================================
  Files        1075     1231     +156     
  Lines       54773    58057    +3284     
  Branches     8168     8567     +399     
==========================================
+ Hits        36396    42259    +5863     
+ Misses      15700    13020    -2680     
- Partials     2677     2778     +101     

Flag	Coverage Δ
#integration	45.24% <49.14%> (?)
#unittests	63.93% <38.09%> (?)

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

Impacted Files	Coverage Δ
...ot/broker/broker/AllowAllAccessControlFactory.java	100.00% <ø> (ø)
.../helix/BrokerUserDefinedMessageHandlerFactory.java	52.83% <0.00%> (-13.84%)	⬇️
...ava/org/apache/pinot/client/AbstractResultSet.java	53.33% <0.00%> (-3.81%)	⬇️
.../main/java/org/apache/pinot/client/Connection.java	44.44% <0.00%> (-4.40%)	⬇️
.../org/apache/pinot/client/ResultTableResultSet.java	24.00% <0.00%> (-10.29%)	⬇️
...not/common/assignment/InstancePartitionsUtils.java	78.57% <ø> (+5.40%)	⬆️
.../apache/pinot/common/exception/QueryException.java	90.27% <ø> (+5.55%)	⬆️
...pinot/common/function/AggregationFunctionType.java	98.27% <ø> (-1.73%)	⬇️
.../pinot/common/function/DateTimePatternHandler.java	83.33% <ø> (ø)
...ot/common/function/FunctionDefinitionRegistry.java	88.88% <ø> (+44.44%)	⬆️
... and 984 more

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[mayankshriv]

disableUpsert is a bit confusing. Initially it led me to believe that it is actually going to disable upsert operation, which led me to question why the read path should have the option to disable upsert in the write path.

Upon reading the changes, I feel a better name might be something along the lines of skipUpsert, ignoreUpsert or skipUpsertedDocIds, for better readability.

[yupeng9]

disableUpsert is a bit confusing. Initially it led me to believe that it is actually going to disable upsert operation, which led me to question why the read path should have the option to disable upsert in the write path.

Upon reading the changes, I feel a better name might be something along the lines of skipUpsert, ignoreUpsert or skipUpsertedDocIds, for better readability.

Makes sense. I prefer skipUpsert.

[Jackie-Jiang]

LGTM with minor comments

[Jackie-Jiang]

(nit) isSkipUpsert() to be consistent with the variable name?