Support multiple events of same type

[evilrobot-01]

• adds support for multiple events of same type, using existing logic to evaluate potential match (based on event config) before allocation to event result
  • isolates change to a single function
  • cloning could be heavy, but simplest way to evaluate match before accepting
• added simple test to ensure functionality works as expected, useful for regression testing. e.g. yarn zombienet-test -t tests -c tests/config.toml
• enabled sourcemap generation within tsconfig.json for debugging (not sure of any side-effects)

Note: unable to check examples due to missing binaries (collectives-polkadot) and statemin(e/t) not producing blocks, possibly due to me using polkadot/polkadot-parachain built on 0.9.30. The collators dont seem to be peering, which was an issue with my firewall in the past.

[evilrobot-01]

Note: I have noticed that tests time out if no expected matching event is found, but havent yet verified whether this was the case prior to this PR (e.g. a misspelling in expected event name). Will convert to draft until I have confirmed.

[evilrobot-01]

Confirmed that the latest release does indeed suffer the same issue: a timeout occurs if an expected event is not matched (e.g. misspelled name):

Error: Timeout of 300000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/Users/user/.config/yarn/global/node_modules/@parity/parachains-integration-tests/dist/run.js)