remove check for AA support on chain (to support stealth chains)

[d4mr]

PR-Codex overview

This PR focuses on removing a check for chain support for smart backend wallets in the insertTransaction function, streamlining the transaction insertion process.

Detailed summary

• Removed the conditional check that verifies if the chain supports the "account-abstraction" service.
• Eliminated the error throwing for unsupported chains regarding smart backend wallets.
• Updated the queuedTransaction object to set isUserOp to true.

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