feat: show webview resources on http instances

Description

allows showing http resources when the instance runs over HTTP

Related Issues

Resolves Avatar not displayed if Gitlab is running over ... (#305 - closed)

How has this been tested?

HTTPS

1. Test that you can see avatars when you open an issue in VS Code Extension

csp-https

HTTP

your GDK must run on HTTP

1. clone a GDK project
2. open it in the extesion
3. add a GDK account using your PAT
4. open an issue in the project
5. see that the avatars are visible

csp-http

What CHANGELOG entry will this MR create?

• fix: Bug fix fixes - a user-facing issue in production - included in changelog
• feature: New feature - a user-facing change which adds functionality - included in changelog
• BREAKING CHANGE: (fix or feature that would cause existing functionality to change) - should bump major version, mentioned in the changelog
• None - other non-user-facing changes