improve date time field validation

[zhtaoxiang]

improve date time field validation to discover schema issues early

[Jackie-Jiang]

LGTM, only minor comments

[codecov-commenter]

Codecov Report

Merging #8792 (d2d8e18) into master (c4549e2) will increase coverage by 6.78%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #8792      +/-   ##
============================================
+ Coverage     62.86%   69.64%   +6.78%     
- Complexity     4601     4621      +20     
============================================
  Files          1690     1736      +46     
  Lines         89212    91217    +2005     
  Branches      13411    13633     +222     
============================================
+ Hits          56082    63530    +7448     
+ Misses        29079    23270    -5809     
- Partials       4051     4417     +366     

Flag	Coverage Δ
integration1	26.96% <0.00%> (?)
integration2	25.41% <0.00%> (?)
unittests1	66.20% <100.00%> (+0.05%)	⬆️
unittests2	14.21% <0.00%> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
...ache/pinot/spi/data/DateTimeFormatPatternSpec.java	79.59% <100.00%> (+7.36%)	⬆️
.../org/apache/pinot/spi/data/DateTimeFormatSpec.java	77.14% <100.00%> (+0.33%)	⬆️
...inot/plugin/inputformat/json/JSONRecordReader.java	0.00% <0.00%> (ø)
...ot/plugin/metrics/yammer/YammerMetricsFactory.java	100.00% <0.00%> (ø)
...che/pinot/server/api/resources/TablesResource.java	43.97% <0.00%> (ø)
...ugin/inputformat/csv/CSVRecordExtractorConfig.java	0.00% <0.00%> (ø)
.../pinot/server/starter/helix/BaseServerStarter.java	59.94% <0.00%> (ø)
.../java/org/apache/pinot/server/conf/ServerConf.java	80.76% <0.00%> (ø)
...t/plugin/metrics/yammer/YammerMetricsRegistry.java	60.00% <0.00%> (ø)
...pache/pinot/server/starter/helix/SegmentLocks.java	100.00% <0.00%> (ø)
... and 397 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c4549e2...d2d8e18. Read the comment docs.