Subaccount movement to another GA must update labels

[piotrmiskiewicz]

Subaccount movement which is an OSB context update must change labels in Kyma/GardenerCluster/Runtime resources.

AC

• if all SKRs have empty "subscriptionGlobalAccountID": "", contact Zohar and ask him what was the last SA moves on production
• when a context update with a GA change occurs, proper GA labels in Kyma, Runtime and GardenerCluster resoruces must bu updated
• test to move existing SKR with the same SA to new GA. Check if 'kcp rt' returns such information

-prepare a script which updates all resources, where GA has been changed
-Update Kyma and Runtime CRs, unify a way how we label those two resources (right now, we have two implementations)
-when everything tested on our side, contact Zohar and ask him to move our SA (Kyma enabled) from one GA to another e.g. from gopher-team to kyma-test

Crossed points are moved to separate subtasks:

https://github.com/orgs/kyma-project/projects/38/views/1?pane=issue&itemId=81021880
https://github.com/orgs/kyma-project/projects/38/views/1?pane=issue&itemId=81021560

[ukff]

investigation result: all SKRs have empty "subscriptionGlobalAccountID": ""

broker=> select instance_id, subscription_global_account_id from instances where subscription_global_account_id != '';
instance_id | subscription_global_account_id
-------------+--------------------------------
(0 rows)

broker=> select instance_id, subscription_global_account_id from instances_archived where subscription_global_account_id != '';
instance_id | subscription_global_account_id
-------------+--------------------------------
(0 rows)