EVM key store on top of common key store lib

[connorwstein]

Notes

• Adds helpers for creating EVM transaction keys and EVM OCR onchain keyrings on top of the new base keystore library Includes a test with real libocr to ensure the keys/keyrings function. Example usage:

	ks, err := keystore.LoadKeystore(ctx, storage, "test-password", commonks.WithScryptParams(commonks.FastScryptParams))
	require.NoError(t, err)
	testKey, err := evmks.CreateTxKey(ks, "test-tx-key")
	require.NoError(t, err)
	resp, err := testKey.SignTx(ctx, evmks.SignTxRequest{
		ChainID: big.NewInt(1337), // Use a test chain ID
		Tx:      testTransaction,
	})
	require.NoError(t, err)
	require.NoError(t, backend.Client().SendTransaction(ctx, resp.Tx))

• Points to latest chainlink-common which includes a golang version bump to 1.25, which required the v2 linter version. As per @chainchad's rec switched to using the common/standard one instead so we could remove the custom one here (but we can override it again if needed).

[pavel-raykov]

wouldn't you be able to reuse

chainlink-evm/pkg/transmitter/dual_contract_transmitter.go

Line 98 in 8eb761a

func (oc *dualContractTransmitter) Transmit(ctx context.Context, reportCtx ocrtypes.ReportContext, report ocrtypes.Report, signatures []ocrtypes.AttributedOnchainSignature) error {

?

[connorwstein]

doesn't look like it - that struct has many other dependencies (logpoller etc.)