Split `azure-mgmt-containerregistry`

[msyyc]

related SDK PR:

• [AutoPR azure-mgmt-containerregistrytasks]-generated-from-SDK Generation - Python-5780621 #44786
• [AutoPR azure-mgmt-containerregistry]-generated-from-SDK Generation - Python-5777145 #44775

We need finish the following tasks step by step:

• update python configuration to mitigate unnecessary breakings
• prepare migration doc
• release packages

[msyyc]

resolved