feat(cmd/influx): easy switch config

[kelwang]

Closes #17401

Add an easy way to switch config, manually tested

• CHANGELOG.md updated with a link to the PR (not the Issue)
• Well-formatted commit messages
• Rebased/mergeable
• Tests pass
• http/swagger.yml updated (if modified Go structs or API)
• Documentation updated or issue created (provide link to issue/pr)
• Signed CLA (if not already signed)

[jsteenb2]

looks good to me. One nit, not related to this however, I wish we represented the Config with the name inside of it. Instead of having the map[name]config. Its a nit, but it concerns me having to juggle state in two places.... something to think about 🤷‍♂

[kelwang]

looks good to me. One nit, not related to this however, I wish we represented the Config with the name inside of it. Instead of having the map[name]config. Its a nit, but it concerns me having to juggle state in two places.... something to think about 🤷‍♂

sure, will definitely think about it