[storage] anvil-manage-server-storage high level tracker

[fabbione]

• [storage] anvil-manage-server-storage CLI options must be cleaned up #654
• [storage] Add disk adding to anvil-manage-server-storage #352 - partially working
• [storage] The "anvil-manage-server-storage --grow X" adds X to the existing space #552 - partially working
• [storage] anvil-manager-server-storage creates a new disk but doesn't add it to the definition #611 - works with server on
• [storage] anvil-manage-server-storage does not have a remove operation #655
• [storage] anvil-manage-server-storage add machine parsable output for test automation #656
• [storage] anvil-manage-server-storage database gets corrupted in server delete / create #657
• [storage] anvil-manage-server-storage MUST NOT allow resize of a boot disk with running VM. #658