cmd/gitserver: add p4-fusion to gitserver Docker image
Created by: sashaostrikov
Included p4-fusion built from salesforce sources to gitserver Docker image
Closes https://github.com/sourcegraph/sourcegraph/issues/26926
Created by: sashaostrikov
Included p4-fusion built from salesforce sources to gitserver Docker image
Closes https://github.com/sourcegraph/sourcegraph/issues/26926