Update extension icons to match new icon style

[miguelsolorio]

This is to track the work of updating our main extensions to match our new outline icon style (#8017). Below is a list of the extensions we are tracking to update:

• Find All References - PR#52
• GitHub Pull Requests - PR#1261
• Remote Development
• Minimal file icon theme - PR#77431
• Docker - Update icons to match new VS Code style vscode-docker#1192
• Azure Tools - Update icons to new icon style vscode-azure-pack#19
• Live Share - Update icons to new icon style live-share#2765

[tavrez]

What about Live Share?

[miguelsolorio]

@tavrez added to the list ;) FYI @lostintangent, let's coordinate

[miguelsolorio]

I've created issues for the Azure + Live Share team to look into updating their icons (updated the description). Since we don't own those extensions (and the rest of their extension packs) I'm going to close this as we've finished the work on our side.