Check if buckets are outdated in scoop status

[nimzo6689]

#3549

[Ash258]

Duplicating code from update is not key.

completely easy, non resource consuming fix could look like this:,

Test-UpdateStatus {
	Get-LocalBucket | Foreach-Object {
		$loc = Find-BucketDirectory $_ -Root
		Push-Location $
		git_fetch -q 
		$status = (git_status) -like 'is behind'
		Pop-Location

		if ($status) { return $true }
	}
}

[nimzo6689]

@Ash258
Thanks for the advice.
I've updated some codes for refactoring.

*In PowerShell, return in Foreach-Object behaves like the continue statement. (I missed it.)
So I replaced it with foreach statement for return early.

How about this?

[Ash258]

Suggested change

	if ($needs_update) {
	if (!(Test-ScoopLatest)) {

[nimzo6689]

$needs_update is also used in L115.

[rashil2000]

Superseded by #5011