[9.x] Adds compilePushIf and compileEndpushIf functions

[mahmoudmohamedramadan]

Sometimes we need to check about something to push the script, instead of using the if directive we can use this directive, for illuminate see the next example:

Old version

@if (true==false)
@push('scripts')
<script>
    console.log('Push');
</script>
@endpush
@endif

New version

@pushIf(true==false, 'scripts')
<script>
    console.log('Push If');
</script>
@endPushIf