feat: Use `cdn.web-ide.gitlab-static.net` for webviewContentExternalBaseUrlTemplate

• feat: Use `cdn.web-ide.gitlab-static.net` for w... (!196 - merged)
• Add gitlab-cdn.net to Web IDE CSP (gitlab!122812 - closed)

Description

This MR sets up the Web IDE to use the cdn.web-ide.gitlab-static.net domain that was set up https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/23877#note_1420808428.

Screenshots