shared: codemod `shared/symbols` `shared/notifications` `shared/extensions` `shared/components/ResultContainer` components

Created by: gitstart-sourcegraph

Descriptions

This PR results from the global-css-to-css-modules codemod application with some manual fixes, caused by the usage of global CSS classes tied to a React component in other parts of the codebase

Refs

• SG Issue
• Gitstart Ticket

Success criteria

The stylesheets in the following directories are converted to CSS modules.

• client/shared/src/components/ResultContainer.tsx
• client/shared/src/symbols
• client/shared/src/notifications
• client/shared/src/extensions