vsce: fix router issue
Created by: taras-yemets
Closes https://github.com/sourcegraph/sourcegraph/issues/40891
Wraps components tree with react-router-specific routers so that the components down the tree which depend on location/history/etc. do not error out. Search panel components were previously wrapped with these routers, but sidebar search ones weren't.
Test plan
VSCE tests pass in CI