generalize add cabinet workflow by moving cobra command down to provider layer

[jacobsalmela]

Summary and Scope

• adds a MergeProviderCommand() function, which can be re-used by each subcommand. This allows the CANI cobra command to be merged with the provider-specific command
• MergeProviderCommand() is used with the add cabinet and add blade workflows
• CSM-specific things are removed from add_cabinet.go and moved down internal/provider/csm package. This generalizes the command and opens the door for other providers to use the command and adding their customizations on top
• As part of this change, metadata is no longer passed to AddCabinet() and is instead generated in the CSM package using the cobra command. This required some domino-effect changes throughout the package
• RecommendHardware() and BuildHardwareMetadata()interface modified to accept the cobra command and args
• A method for func (r HardwareRecommendations) Print() printing is used instead of printing provider-specific things instead of baking this currently-csm-specific info into the cmd layer
• logic in internal/provider/csm/csv.go was slightly adjusted to account for the new metadata changes

Risks and Mitigations

Medium to low.

• only one test was changed, metadata_test.go, which was required since the function needed new arguments. The change is relatively minor, still proving the code remains as stable as is was in main
• new code/logic is introduced so it can introduce new issues but is necessary to support multiple providers