With this change a new UUID is generated to reference parent/child relationship
between objects in the Non Admin Controller use cases.

The first consumer of this UUID is a Velero Backup, created when the
NonAdminBackup object is reconciled.

The NonAdminBackup object generates the NAC UUID and stores it in its
Status. This prevents users from modifying it. The UUID is later used
to create the Velero Backup during reconciliation.

While the NAC UUID is currently used as the Velero Backup name, this is
not required, as the UUID is also stored as a Velero Backup label, which
is used during the reconcile loop. Usage of NAC UUID as Velero Backup name
is to easy it's creation.

This PR also includes small changes to fix linting issues of the code,
as well reworks the tests to properly take advantage of gingko BeforeEach
function.

Signed-off-by: Michal Pryc <[email protected]>

Improved function to properly validate NAC Object Labels
Dropped length of Annotation Value validation, as it's not limited
to 63 or 256 chars.

Signed-off-by: Michal Pryc <[email protected]>

Changes to address code review.

Signed-off-by: Michal Pryc <[email protected]>

Renamed function which lists objects by label in a
specific namespace.

Signed-off-by: Michal Pryc <[email protected]>

Change to include:
 - Reworked diagram to include one reconcile entry and multiple states
 - Labels and annotations uses common function to check for the
   name and namespace value length
 - Additional test to cover above scenario.

Signed-off-by: Michal Pryc <[email protected]>