Implement DatetimeIndex.indexer_between_time()

[xinrong-meng]

Implement DatetimeIndex.indexer_between_time()

>>> kidx = ks.date_range("2000-01-01", periods=3, freq="T")
>>> kidx 
DatetimeIndex(['2000-01-01 00:00:00', '2000-01-01 00:01:00',
               '2000-01-01 00:02:00'],
              dtype='datetime64[ns]', freq=None)
>>> kidx.indexer_between_time("00:01", "00:02").sort_values()
Int64Index([1, 2], dtype='int64')
>>> kidx.indexer_between_time("00:01", "00:02", include_end=False).sort_values()
Int64Index([1], dtype='int64')
>>> kidx.indexer_between_time("00:01", "00:02", include_start=False).sort_values()
Int64Index([2], dtype='int64')

[codecov-io]

Codecov Report

Merging #2104 (3cbb5d0) into master (2fe8796) will decrease coverage by 0.05%.
The diff coverage is 95.45%.

@@            Coverage Diff             @@
##           master    #2104      +/-   ##
==========================================
- Coverage   95.21%   95.16%   -0.06%     
==========================================
  Files          60       60              
  Lines       13460    13459       -1     
==========================================
- Hits        12816    12808       -8     
- Misses        644      651       +7     

Impacted Files	Coverage Δ
databricks/koalas/missing/indexes.py	100.00% <ø> (ø)
databricks/koalas/indexes/datetimes.py	96.32% <92.30%> (-2.08%)	⬇️
databricks/koalas/tests/indexes/test_datetime.py	97.67% <100.00%> (-2.33%)	⬇️
databricks/koalas/typedef/typehints.py	89.07% <0.00%> (-5.50%)	⬇️
databricks/koalas/tests/indexes/test_category.py	98.21% <0.00%> (-1.79%)	⬇️
databricks/koalas/internal.py	95.75% <0.00%> (-0.93%)	⬇️
databricks/koalas/tests/indexes/test_base.py	99.38% <0.00%> (-0.62%)	⬇️
databricks/koalas/groupby.py	94.43% <0.00%> (+2.80%)	⬆️

---

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 2fe8796...3cbb5d0. Read the comment docs.

[ueshin]

LGTM, pending tests.

[ueshin]

The test result looks weird https://github.com/databricks/koalas/pull/2104/checks?check_run_id=2144103456.
Let me retrigger.

[ueshin]

Thanks! merging.

[xinrong-meng]

Thanks, @ueshin !