refactor: introduce a base class for ElasticsearchDocumentStore

[masci]

Related Issues

• related to Add support for Elasticsearch 8 #2810

Proposed Changes:

• Follow up of refactor: prepare support to Elasticsearch 8 #5226
• Extract a base class and make the existing ElasticsearchDocmentStore version specific

How did you test it?

unit tests, integration tests, manual verification

Notes for the reviewer

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[coveralls]

Pull Request Test Coverage Report for Build 5411442758

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 89 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.02%) to 44.041%

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Files with Coverage Reduction	New Missed Lines	%
document_stores/elasticsearch/es7.py	6	80.0%
document_stores/filter_utils.py	83	41.91%

Totals
Change from base Build 5410444095:	-0.02%
Covered Lines:	10074
Relevant Lines:	22874

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💛 - Coveralls