[codegen] update to latest spec (#1176)

Co-authored-by: Laura Trotta <laura.trotta@elastic.co>

[9.2] Regenerate client (#1177)

* [codegen] update to latest spec

* revert unwanted changes

---------

Co-authored-by: Laura Trotta <laura.trotta@elastic.co>

[9.1] Regenerate client (#1175)

* [codegen] update to latest spec

* revert unwanted changes

---------

Co-authored-by: Laura Trotta <laura.trotta@elastic.co>

[codegen] update to latest spec (#1174)

Co-authored-by: Laura Trotta <laura.trotta@elastic.co>

fix size calculation in bulk ingester (#1167) (#1168)

Co-authored-by: Laura Trotta <153528055+l-trotta@users.noreply.github.com>

fix pit unit test

Update apache client 5.6 + correct gzip handling (#1143)

* support new gzip

* get entity details from response

* fix gzip test

* unused import

Update apache client 5.6 + correct gzip handling (#1143)

* support new gzip

* get entity details from response

* fix gzip test

* unused import

fix doc link

[9.2] Regenerate client (#1153)

* [codegen] update to latest spec

* unused imports

---------

Co-authored-by: Laura Trotta <laura.trotta@elastic.co>