Add semantic title to notification content

[petermakowski]

to add proper semantics to notification so that you can query their content by title (something to solve in vanilla/react-components).

This will make for better accessibility and our components easier to test. Currently we have to resort to workarounds like the one below, partial text matching, or test id.

      screen.getByText((content, element) => {
        return (
          content !== "" &&
          element?.textContent?.includes(
            "Configure 1 other controller with Vault to complete this operation."
          )
        );
      })

Originally posted by @petermakowski in #4503 (comment)