Pass endpoint_id and path_parts to transport (#2457)

* Accept endpoint_id/path_parts in base clients

* Run code generation

(cherry picked from commit 45518b0)

Author: pquentin

dev-requirements.txt

@@ -1,4 +1,5 @@
-elastic-transport>=8.0.0b1, <9
+# TODO switch back to elastic-transport>=8,<9 between elastic-transport release and elasticsearch-py release
+elastic-transport @ git+https://github.com/elastic/elastic-transport-python
 requests>=2, <3
 aiohttp
 pytest
@@ -28,4 +29,4 @@ protobuf<4; python_version<="3.7"
 # Override Read the Docs default (sphinx<2 and sphinx-rtd-theme<0.5)
 sphinx>2
 sphinx-rtd-theme>0.5
-sphinx-autodoc-typehints
+sphinx-autodoc-typehints