Update Execute method for ProcessStartedHandler to prevent stalled tests

[aishwaryabh]

Issue describing the changes in this PR

resolves #4392

After merging in #4364, when the tests are run locally today for core tools for func start, if the process starts up and is not interrupted within the test by the processStartedHandler (example: we expect the test to fail and throw an error before the host starts up, but it doesn't so the test is stuck since the host starts up successfully and is waiting for the user to manually kill the process), the test stalls, which is a flaw in the design.

To workaround this, a timeout would need to be added to the processTask here. If the timeout is reached before processStarted is finished, we have to manually kill the process by doing _process.Kill(true)

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes do not need to be backported to a previous version
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• I have added all required tests (Unit tests, E2E tests)

[Copilot]

Pull Request Overview

This PR addresses a stalled test issue by introducing a timeout for the processStartedHandler and ensuring that processes are killed when the handler exceeds the allowed time. Key changes include:

• Adding a new E2E test to simulate a stalled process and verify that it is killed after a 2-minute timeout.
• Implementing a TimeoutHelper that wraps the processStartedHandler execution with a 2-minute timeout.
• Updating the Execute method to use the TimeoutHelper and forcibly kill the process if the handler does not complete in time.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
test/Cli/Func.E2E.Tests/Commands/FuncStart/TestsWithFixtures/NodeV4Tests.cs	Added a new E2E test to simulate and verify the timeout behavior for stalled processes.
src/Cli/Abstractions/Helpers/TimeoutHelper.cs	Introduced a helper method to run tasks with a timeout.
src/Cli/Abstractions/Command/Command.cs	Updated the Execute method to incorporate the timeout logic and handle process killing.