Sync eng/common directory with azure-sdk-tools for PR 14308

[azure-sdk]

Sync eng/common directory with azure-sdk-tools for PR Azure/azure-sdk-tools#14308 See eng/common workflow

[Copilot]

Pull request overview

Syncs eng/common spellcheck behavior with azure-sdk-tools by improving how the changed-files spellcheck script interprets failures from the underlying cspell invocation.

Changes:

• Capture cspell’s process exit code after invoking Invoke-Cspell.ps1.
• Fail the script (when -ExitWithError is set) if cspell exits non-zero even when no spelling output is produced.

[Copilot]

The new $cspellExitCode handling still reports success when Invoke-Cspell.ps1 fails but -ExitWithError isn’t set: the script will fall into the final else and print "No spelling errors detected" while returning 0. Consider treating non-zero cspell exit codes as failures (or at least logging a warning and exiting with the same non-zero code) regardless of -ExitWithError, so CI tasks configured with continueOnError: true still surface tool/config failures as a warning rather than a silent pass.

Suggested change

	} elseif ($cspellExitCode -ne 0 -and $ExitWithError) {
	LogError "CSpell exited with code $cspellExitCode. This may indicate a configuration error or other failure in the spell checking tool."
	exit 1
	} elseif ($cspellExitCode -ne 0) {
	if ($ExitWithError) {
	LogError "CSpell exited with code $cspellExitCode. This may indicate a configuration error or other failure in the spell checking tool."
	} else {
	LogWarning "CSpell exited with code $cspellExitCode. This may indicate a configuration error or other failure in the spell checking tool."
	}
	exit $cspellExitCode