cli/command: remove dependency on distribution/uuid

[thaJeztah]

This uuid package was introduced in 89db01e (#4889), but we want to reduce dependency on the old docker/distribution module.

Replace it with google/uuid, which is a commonly used module for this and already a dependency.

- Human readable description for the release notes

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 59.34%. Comparing base (3f154ad) to head (fda7da2).
Report is 2 commits behind head on master.

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (50.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5879      +/-   ##
==========================================
+ Coverage   59.32%   59.34%   +0.02%     
==========================================
  Files         353      353              
  Lines       29731    29731              
==========================================
+ Hits        17637    17645       +8     
+ Misses      11112    11103       -9     
- Partials      982      983       +1     

[thaJeztah]

I should mention that in theory, uuid.NewString() could panic, but I think chances for this to happen are really exceptional, and it's probably fine to just panic in that case;

cli/vendor/github.com/google/uuid/version4.go

Lines 17 to 23 in 3f154ad

	// NewString creates a new random UUID and returns it as a string or panics.
	// NewString is equivalent to the expression
	//
	// uuid.New().String()
	func NewString() string {
	return Must(NewRandom()).String()
	}

[thaJeztah]

Alternatively we could do NewRandom(), check the error, and ignore it, but not sure if that's good.

[thaJeztah]

Ah, and existing code also could panic, so I think this comment can be ignored, as it doesn't change anything from that perspective;

cli/vendor/github.com/docker/distribution/uuid/uuid.go

Lines 72 to 74 in 3f154ad

	// Any other errors represent a system problem. What did someone
	// do to /dev/urandom?
	panic(fmt.Errorf("error reading random number generator, retried for %v: %v", totalBackoff.String(), err))