Fix local resources loading

[ila-embsys]

It fix #10

I found in the microsoft/vscode#81685 that:

The webview.asWebviewUri is now the preferred way to load local resources in webview. We really want all webviews to migrate to using this api instead of using vscode-resource uri directly.

...so all these changes are done around it.

Also the tests that look like someone's sandbox are removed and disabled some checks that require a lot of fixes that do not relate to the related issue.

[a13ph]

@mvitlov can we get this merged in?