fix(sync): ApplyOutOfSyncOnly=true sync option is not honoured for cluster scoped resources (#765)

* Using live obj to get the resource key if not nil

Signed-off-by: Anand Francis Joseph <anjoseph@redhat.com>

* Fixed failing unit tests

Signed-off-by: Anand Francis Joseph <anjoseph@redhat.com>

* Added test case for validating cluster scoped resources with ApplyOutOfSyncOnly=true

Signed-off-by: Anand Francis Joseph <anjoseph@redhat.com>

* Fixed gofumpt formatting errors

Signed-off-by: Anand Francis Joseph <anjoseph@redhat.com>

* Corrected unit tests for cluster scoped resources

Signed-off-by: Anand Francis Joseph <anjoseph@redhat.com>

* Removed unwanted code comments

Signed-off-by: Anand Francis Joseph <anjoseph@redhat.com>

* Added comments for explaining the reason why ns is set from live object

Signed-off-by: Anand Francis Joseph <anjoseph@redhat.com>

* Added comments in the unit test

Signed-off-by: Anand Francis Joseph <anjoseph@redhat.com>

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Signed-off-by: Anand Francis Joseph <anjoseph@redhat.com>