CSI: Add secrets flag support for delete volume

[ggriffiths]

Proposal

Add the option to provide a secret when deleting a volume, i.e.

nomad volume delete vol1 --secrets a=b,c=d

Similar to #10640

These secrets will take precedence over any stored volume secrets. They'll be combined into a single secrets map and sent to the CSI driver.

I can work on this feature if the proposal is accepted.

Use-cases

For cases when a new secret must be provided to the storage system during deletion. I.e. if a token has expired or encryption key change.

Attempted Solutions

n/a

[lgfa29]

Thank you @ggriffiths. This addition makes sense to me 🙂

[ggriffiths]

Great! Will be picking up this work soon.

[lgfa29]

Great! Will be picking up this work soon.

Awesome! Let us know if you need any help 😄

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