Add timeColumn, timeUnit and totalDocs to the json segment metadata

[Jackie-Jiang]

Add the missing timeColumn, timeUnit and totalDocs info to the json segment metadata

[codecov-commenter]

Codecov Report

Merging #7765 (1b22021) into master (781f5cd) will decrease coverage by 7.36%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##             master    #7765      +/-   ##
============================================
- Coverage     71.67%   64.30%   -7.37%     
+ Complexity     4076     4002      -74     
============================================
  Files          1578     1569       -9     
  Lines         80625    80284     -341     
  Branches      11982    11945      -37     
============================================
- Hits          57785    51624    -6161     
- Misses        18945    24995    +6050     
+ Partials       3895     3665     -230     

Flag	Coverage Δ
integration1	29.21% <0.00%> (-0.22%)	⬇️
integration2	27.93% <0.00%> (+0.13%)	⬆️
unittests1	68.66% <66.66%> (+0.06%)	⬆️
unittests2	?

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

Impacted Files	Coverage Δ
...egment/spi/index/metadata/SegmentMetadataImpl.java	74.56% <66.66%> (-0.14%)	⬇️
...pinot/controller/recommender/io/ConfigManager.java	0.00% <0.00%> (-100.00%)	⬇️
...troller/recommender/io/metadata/FieldMetadata.java	0.00% <0.00%> (-100.00%)	⬇️
...roller/recommender/rules/impl/BloomFilterRule.java	0.00% <0.00%> (-100.00%)	⬇️
...oller/api/resources/PinotControllerAppConfigs.java	0.00% <0.00%> (-100.00%)	⬇️
...ler/recommender/data/generator/BytesGenerator.java	0.00% <0.00%> (-100.00%)	⬇️
...er/recommender/io/metadata/SchemaWithMetaData.java	0.00% <0.00%> (-100.00%)	⬇️
...r/recommender/rules/impl/AggregateMetricsRule.java	0.00% <0.00%> (-100.00%)	⬇️
.../recommender/exceptions/InvalidInputException.java	0.00% <0.00%> (-100.00%)	⬇️
.../recommender/rules/io/configs/PartitionConfig.java	0.00% <0.00%> (-100.00%)	⬇️
... and 224 more

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