[BUG] Elasticsearch module is broken with latest elasticsearch library

Description
Trying to use the elasticsearch returner with the latest elasticsearch-py library (>= 8.x) fails to initialize, because salt's elasticsearch module is attempting to load a deprecated connection module

Setup
I'm trying to use the elasticsearch returner, following the instructions here

The elasticsearch return always fails:

[DEBUG   ] Could not LazyLoad elasticsearch.index_exists: 'elasticsearch' __virtual__ returned False: Cannot load module elasticsearch: elasticsearch libraries not found
[DEBUG   ] LazyLoaded nagios.list_plugins                                                                                                                                                                                                        
[DEBUG   ] Could not LazyLoad elasticsearch.returner: 'elasticsearch.returner' is not available.                                                                                                                                                 
[ERROR   ] Returner elasticsearch.returner could not be loaded: 'elasticsearch.returner' is not available.

elasticsearch-py is installed:

$ pip freeze | grep elastic
elastic-transport==8.1.2
elasticsearch==8.1.2

Salt's elasticsearch module is failing at this line:

https://github.com/saltstack/salt/blob/master/salt/modules/elasticsearch.py#L62

from elasticsearch import RequestsHttpConnection

because RequestsHttpConnection no longer exists

Python 3.8.10 (default, Mar 15 2022, 12:22:08) 
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import elasticsearch
>>> from elasticsearch import RequestsHttpConnection
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'RequestsHttpConnection' from 'elasticsearch' (/usr/local/lib/python3.8/dist-packages/elasticsearch/__init__.py)

According to the release notes, the connection module has been removed and replaced with the elastic-transport package

Steps to Reproduce the behavior

1. Install the latest elasticsearch module (8.x or greater)
2. Try to use the elasticsearch returner

Expected behavior
Elasticsearch module should load successfully.

Versions Report

Start in salt/modules/elasticsearch.py at the RequestsHttpConnection import identified in the issue. Read the Elasticsearch 8.0 release notes and the module's initialization path to understand the replacement connection API. Done means the Elasticsearch module loads and the returner initializes successfully with elasticsearch 8.x.