[DOCS] should use setPostFilter instead of setFilter
fixed markup and typo
[DOCS] add DynamoDB river plugin
add elasticsearch-osem to integrations page
[DOCS] fixed count and validate query docs, they now require a top-level query object, same as other apis

Relates to #4074
Closes #5111
[DOCS] rephrased delete by query docs
[DOCS] fixed count docs, it now requires a top-level query object, same as other apis

Relates to #4074
Fix typo in similarity docs

DRF similarity -> DFR similarity
Allow specifying nested fields in simple_query_string

Fixes #5091
[docs] fixed errors in aggs docs
- error in nested aggs example
- error in terms aggs example
[TEST] added missing wait for yellow in put warmer REST test
Added the `DistanceUnit.NAUTICALMILES` enumeration
label with the corresponding *NM* and *nmi* unit
suffixes. Update the docs to match.

Closes #5085
Update get.asciidoc

Minor improvements.

curl -XHEAD doesn't actually print anything so I've changed to use -I which actually prints the headers received.
[DOCS] improved get docs

- added _version to response
- exists call use -XHEAD with -i flag to include headers in the output
Make sure that parent type is created explicitly.
Cleaned up the p/c integration tests to use shorter mapping definition, ensureGreen() and .get()
Fixed issue where highlighting in percolate existing doc api doesn't work (no highlight snippets)
code coverage hookup
Add preserve original token option to ASCIIFolding

Closes #4931
Add support for `lowercase_expanded_terms` flag to simple_query_string

Default the flag to true, making simple_query_string behave similarly to
query_string

Fixes #5008
Fix license header for SimpleQueryParser