Update GitLab Workhorse to v8.0.0

GITLAB_WORKHORSE_VERSION

-7.6.0
+8.0.0

changelogs/unreleased/55191-update-workhorse.yml

+---
+title: Update GitLab Workhorse to v8.0.0
+merge_request: 23740
+author:
+type: other

lib/gitlab/workhorse.rb

@@ -31,7 +31,6 @@ module Gitlab
           GL_USERNAME: user&.username,
           ShowAllRefs: show_all_refs,
           Repository: repository.gitaly_repository.to_h,
-          RepoPath: 'ignored but not allowed to be empty in gitlab-workhorse',
           GitConfigOptions: [],
           GitalyServer: {
             address: Gitlab::GitalyClient.address(project.repository_storage),

spec/lib/gitlab/workhorse_spec.rb

@@ -246,7 +246,6 @@ describe Gitlab::Workhorse do
         GL_ID: "user-#{user.id}",
         GL_USERNAME: user.username,
         GL_REPOSITORY: "project-#{project.id}",
-        RepoPath: repo_path,
         ShowAllRefs: false
       }
     end
@@ -261,7 +260,6 @@ describe Gitlab::Workhorse do
           GL_ID: "user-#{user.id}",
           GL_USERNAME: user.username,
           GL_REPOSITORY: "wiki-#{project.id}",
-          RepoPath: repo_path,
           ShowAllRefs: false
         }
       end