[codeplatform] Move symbols service to Codenav service.
Created by: Numbers88s
Closes https://github.com/sourcegraph/sourcegraph/issues/41060
Move symbols service to Codenav service.
Test plan
Make sure all test pass
Created by: Numbers88s
Closes https://github.com/sourcegraph/sourcegraph/issues/41060
Move symbols service to Codenav service.
Make sure all test pass