Renaming terraform workspace new command to terraform workspace create

[twalker1998]

Renaming terraform workspace new to terraform workspace create to ensure subcommands for terraform workspace are all the same part of speech

Fixes #35789

Target Release

This will likely constitute a breaking change

Draft CHANGELOG entry

ENHANCEMENTS

Ensuring all terraform workspace subcommands are the same part of speech

• Users creating a new workspace via the Terraform CLI should use terraform workspace create instead of terraform workspace new

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[twalker1998]

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I've signed the CLA, as evidenced by #35790 (comment)

[crw]

Thanks for this submission. At triage the maintainers decided not to accept this change, and also would not be willing to accept the alternative of an alias, to keep the surface area for this feature as minimal as possible. Thanks for this submission, we appreciate the feedback and effort!