cli: deprecate VisitAll, DisableFlagsInUseLine utilities, remove HasCompletionArg

[thaJeztah]

cli: remove HasCompletionArg utility

It was only used in a single place and has no external consumers.
Move it to where it's used to keep things together.

cli: deprecate VisitAll, DisableFlagsInUseLine utilities

These utilities were only used internally; create a local copy
where used, and deprecate the ones in cli.

cmd/docker: fix some minor linting issues

- Human readable description for the release notes

Go SDK: cli: deprecate `VisitAll`, `DisableFlagsInUseLine` utilities. These utilities were only used internally and will be removed in the next release.
Go SDK: cli: remove `HasCompletionArg` utility. This utility was only used internally.

- A picture of a cute animal (not mandatory but encouraged)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 54.34783% with 21 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cmd/docker/docker.go	56.25%	14 Missing ⚠️
cli/cobra.go	0.00%	4 Missing ⚠️
cli-plugins/plugin/plugin.go	70.00%	3 Missing ⚠️

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[Copilot]

Pull Request Overview

This PR refactors the CLI utilities by deprecating and removing functions that were only used internally. The main changes include removing the HasCompletionArg utility and deprecating VisitAll and DisableFlagsInUseLine utilities while creating local copies where needed.

• Remove HasCompletionArg utility and move implementation to where it's used
• Deprecate VisitAll and DisableFlagsInUseLine utilities with local implementations
• Fix minor linting issues in cmd/docker package

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
cli/cobra.go	Deprecates VisitAll and DisableFlagsInUseLine utilities, removes HasCompletionArg
cli/cobra_test.go	Removes test for deprecated utilities
cmd/docker/docker.go	Adds local implementation of removed utilities and fixes linting issues
cmd/docker/docker_test.go	Adds test for local visitAll implementation
cli-plugins/plugin/plugin.go	Adds local implementation of visitAll utility
cli-plugins/plugin/plugin_test.go	Adds test for local visitAll implementation

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