WIP TXMv2 broadcast transactions

[eduard-cl]

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[github-actions]

I see you updated files related to core. Please run pnpm changeset in the root directory to add a changeset as well as in the text include at least one of the following tags:

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[github-actions]

AER Report: CI Core

aer_workflow , commit , Detect Changes , Clean Go Tidy & Generate , Scheduled Run Frequency , Flakeguard Root Project / Get Tests To Run , Core Tests (go_core_tests) , Core Tests (go_core_tests_integration) , lint , Core Tests (go_core_ccip_deployment_tests) , Core Tests (go_core_race_tests) , Core Tests (go_core_fuzz) , Flakeguard Deployment Project , Flakeguard Root Project / Run Tests , Flakeguard Root Project / Report , Flakey Test Detection , SonarQube Scan

1. Error return value not checked: [Golang Lint]

Source of Error:

Golang Lint	2024-12-16T17:22:45.0383740Z ##[error]core/chains/evm/txm/txm.go:361:25: Error return value of `t.metrics.EmitTxMessage` is not checked (errcheck)
Golang Lint	2024-12-16T17:22:45.0384902Z 	t.metrics.EmitTxMessage(ctx, tx, address)
Golang Lint	2024-12-16T17:22:45.0385521Z 	 ^

Why: The error occurs because the return value of the function t.metrics.EmitTxMessage is not being checked. This is flagged by the errcheck linter, which ensures that all error return values are handled.

Suggested fix: Check the return value of t.metrics.EmitTxMessage and handle the error appropriately. For example:

if err := t.metrics.EmitTxMessage(ctx, tx, address); err != nil {
    // handle the error
}