Add logic to restart the windows event log service for the windows event log tests

[lisguo]

Description of the issue

We need to ensure the agent is able to publish windows event logs even when the event log service restarts or crashes

Description of changes

Adds steps to kill the event log service pid, and then start the service before publishing event logs. Used a variation of the following powershell script:

Function Get-EventLogPid {
	$ServiceName = 'EventLog'
	$filter = "name like ""$ServiceName"" or displayname like ""$ServiceName"""
	$Service = gcim -ClassName Win32_Service -Filter $filter
	return $Service.ProcessId
}


# 1. Get the EvenLogPid
$EventLogPid = Get-EventLogPid

# 2. Kill EventLog service by PID
Stop-Process $EventLogPid -Force
sleep 20


# 3. Start the eventlog service
Start-Service EventLog

License

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Tests

Ran a test with a version of the agent that did not have the event log fix:
https://github.com/aws/amazon-cloudwatch-agent/actions/runs/10205915443

Ran a test with latest changes of the agent with the event log fix:
https://github.com/aws/amazon-cloudwatch-agent/actions/runs/10205917120

[jefchien]

nit: Could probably have it call your powershell script like the sanity tests.