chore: remove usage of deprecated fields coder_workspace.owner_*

[johnstcn]

Updates the following modules to no longer reference fields matching coderworkspace.owner*:

• coder-login
• git-config
• github-upload-public-key
• jfrog-oauth
• vscode-desktop

Also updates dependency of coder/coder to 0.23.0 for the above.

For context, see https://github.com/coder/terraform-provider-coder/releases/tag/v0.23.0

Also closes #255