fix(connectors): remove change listener on WalletConnect switchChain failure

[Zelys-DFKH]

Fixes #5032

In walletConnect.ts, switchChain registers a change listener on the connector's emitter while waiting for wallet_switchEthereumChain to confirm. When the request fails, Promise.all rejects and control jumps to the catch block, but the listener is never removed. Every failed switch attempt (user rejection, network error, wallet timeout) leaves one orphaned listener permanently attached to the emitter.

Fixed by storing a cleanup reference before registering the listener and calling it at the top of the catch block. Added a test that mocks the provider, fails a switch, and asserts the listener count returns to its pre-call value.

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Latest commit: 1c966a1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@wagmi/connectors	Patch
wagmi	Patch
@wagmi/solid	Patch
@wagmi/vue	Patch

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