fix: remove all selectedNetworkClientid references in bridge-controller

[micaelae]

Explanation

Removes all selectedNetworkClientId references:

• retrieves network client details using the quote request's srcChainId
• refactors metrics request params utilitgy
• updates tests/snapshots

References

Part of https://consensyssoftware.atlassian.net/browse/SWAPS-3122

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

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Note

Removes all selectedNetworkClientId references, deriving network clients via srcChainId, refactors metrics request params, and updates tests/snapshots accordingly.

• Bridge Controller:
  • Remove selected network usage: delete #getSelectedNetworkClientId/#getSelectedNetworkClient; resolve clients via NetworkController:findNetworkClientIdByChainId in #getNetworkClientByChainId.
  • Use srcChainId-derived client for balance checks and provider config; treat non‑EVM src chains accordingly.
  • Simplify polling input: drop networkClientId from BridgePollingInput and startPolling calls.
• Metrics:
  • Refactor getRequestParams to take only quoteRequest (no external srcChainId param) with ETH fallback; update all event builders to use new signature.
• Types:
  • Remove NetworkController:getState from allowed actions and NetworkClientId import/usages.
• Tests/Snapshots:
  • Update mocks and expectations to remove selectedNetworkClientId; adjust call counts and snapshots; ensure network lookup by chainId.
• Changelog:
  • Add Fixed note documenting removal of selectedNetworkClientId usages.

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