fix: rename wsurl endpoints to asset hub

[Imod7]

Description

The changes in this PR are the following :

1. Replaced the wsUrl endpoints with asset-hub
2. Replaced asset-hub-<relay_chain> to <relay_chain>-asset-hub strictly in the places that is user-facing

since :

1. the wsUrl endpoints were also updated in polkadot-js/apps PR #9526 (so we could replace one of the two exceptions from this PR #1296 )
2. based on the feedback from Joe whatever is related to internal structure we keep as AssetHub<Relay> or asset-hub-<relay> and whatever is related to the "user" should be in the format <relay>-asset-hub.

Assumptions

I made the 2nd change with the assumption that user is also someone who is running the tests. If this assumption is not correct then I will rollback that change.

Tests

Run the following tests :

• yarn test:latest-e2e-tests --chain polkadot-asset-hub
• yarn test:historical-e2e-tests --chain polkadot-asset-hub
• yarn test:historical-e2e-tests --chain kusama-asset-hub

⚠️ Note

I had to update also this line because when I was running
yarn test:latest-e2e-tests --chain polkadot-asset-hub
I was getting the error :

Launching jest...
rimraf e2e-tests/build/
tsc --project e2e-tests/tsconfig.json
usage: index.js [-h]
                [--chain {acala,assetHubPolkadot,karura,kusama,polkadot,westend}]
                [--url URL]
index.js: error: argument --chain: invalid choice: 'asset-hub-polkadot' (choose from 'acala', 'assetHubPolkadot', 'karura', 'kusama', 'polkadot', 'westend')
Killing all processes...
Killing sidecar
Killing latest-e2e
[PASSED] All Tests Passed!

This error is also present in the previous PR #1296 so right now in master branch (if you run yarn test:latest-e2e-tests --chain asset-hub-polkadot) but I didn't catch it and neither did the CI because at the end it says [PASSED] All Tests Passed!

Taking this into account, I was thinking that maybe we could change how we check the tests results. For example, if 0/10 tests were run, maybe we could throw an error also ?

[marshacb]

lgtm!