[Imprv] Add detailed doc for using uuid in modules

[bhati-pradeep]

Describe the request
Many modules support CRUD operations and this workflow uses UUID for decision. For example, giving vm_uuid updates and deletes vm as per state.

Add this kind of key details in doc.

Additional docs can be added here :

nutanix.ansible/plugins/modules/ntnx_vms.py

Line 46 in 923e9c7

vm_uuid:

.

[bhati-pradeep]

@Gevorg-Khachatryan-97 can you add this docs in the module docs ? We can use doc_fragements and include it in all supported modules.