repositoryPathPattern fixes

Created by: lguychard

Rel #4370

The changes introduced here are twofold:

• Always resolve Sourcegraph mapped repo name in browser extension code
• Use the raw repo name when getting the definition URL

Test plan:

• Test code intelligence hovers on a repo with repositoryPathPattern
• Test in-code-host jump-to-definition on a repo with repositoryPathPattern
• Test intelligence hovers on a repo without repositoryPathPattern
• Test in-code-host jump-to-definition on a repo without repositoryPathPattern
• Test code intelligence, jump-to-definition on the webapp without repositoryPathPattern
• Test code intelligence, jump-to-definition on the with repositoryPathPattern