Updates to E2E Tests

[wilwade]

We have a grab bag of fixes due to some issues that came to light while trying to run the E2E tests against the Testnet on Paseo.

Going to be a few different PRs, but here's the full list:

• [x] #2010 Split up Staking and Capacity Transaction tests
• [x] #2004 Fix an issue with failing Proxy tests when run against Testnet on Paseo
• [x] #2004 Switch most tests to use the newer createSchemaV3
• [x] #2004 Fix eslint issue with globals
• [x] #2013 Create a new getOrCreateSchemaV3 that reuses prior made schemas
• [x] #2004 Fix Not decorating runtime apis without matching versions: CapacityTransactionPaymentRuntimeApi/1
• [x] #2010 Remove the Rococo e2e test workflow (no longer viable)
• [x] #2013 Move the RPC endpoint for e2e testnet paseo workflow to github vars
• [x] #2013 Ensure correct endpoint RPC connection
• [x] #2013 Major speed increases for the capacity transactions test