feat(query): add time_zone param

[aniaan]

The time_zone parameter is very important for users in non-UTC time zones. We need to add this parameter to adapt to different time zones.

This parameter affects the processing of the time function in the ES-SQL query.

https://www.elastic.co/guide/en/elasticsearch/reference/current/sql-search-api.html

eg:
To demonstrate the role of time_zone, the DATETIME_PARSE function is used, butDATETIME_PARSE can only be used after ES 7.8, so the ES_SUPPORT_DATETIME_PARSE parameter is added to the env

[codecov-commenter]

Codecov Report

Merging #69 (4cf73f2) into master (ea7a093) will increase coverage by 0.13%.
The diff coverage is 100.00%.

❗ Current head 4cf73f2 differs from pull request most recent head de19337. Consider uploading reports for the commit de19337 to get more accurate results

@@ Coverage Diff @@ ## master #69 +/- ## ========================================== + Coverage 94.52% 94.66% +0.13%  ========================================== Files 15 15 Lines 932 956 +24 ========================================== + Hits 881 905 +24  Misses 51 51 

Flag	Coverage Δ
python	94.66% <100.00%> (+0.13%)	⬆️

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Impacted Files	Coverage Δ
es/elastic/api.py	87.23% <ø> (ø)
es/opendistro/api.py	96.18% <ø> (ø)
es/baseapi.py	90.44% <100.00%> (+0.18%)	⬆️
es/tests/test_dbapi.py	100.00% <100.00%> (ø)

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[dpgaspar]

Looks good, can you document this new parameter here: https://github.com/preset-io/elasticsearch-dbapi#connection-parameters

related Superset issue: apache/superset#16726

[aniaan]

Looks good, can you document this new parameter here: https://github.com/preset-io/elasticsearch-dbapi#connection-parameters

related Superset issue: apache/superset#16726

The documentation has been updated, please review