tests(websocket): websocket integration tests

[adisaran64]

Closes: #1241

Description

added skeleton for websocket tests, cannot implement with current version of web3.py
along with #1342 , closes #1241

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[danburck]

@adisaran64 can you add some tests for some the rpc calls, e.g. getBlockNumber (https://ethereum.org/en/developers/tutorials/using-websockets/) ? Or is the batch request blocking you to do this?

It would helpful to add one example of what you can query with websockets here: https://docs.evmos.org/developers/clients.html#ethereum-websocket

[fedekunze]

@adisaran64 what's the status of this PR?

[adisaran64]

@danburck modified the test_types.py file to test the ethermint websocket along with the RPC, so that all rpc calls currently tested are also tested on the websocket. will open a PR to add that example. fixed flake issues as well, needed to ignore some clashing rulesets (long lines vs. line breaks)

[hanchon]

LGTM, tested it locally and it's working fine. The most useful part is the fixture with the normal rpc and the websocket (ethermint_rpc_ws )