Allow downloading archives using PRIVATE-TOKEN

Related to https://gitlab.com/gitlab-org/gitlab/-/issues/28978 and
https://gitlab.com/gitlab-org/gitlab/-/issues/334944.

Changelog: changed

config/feature_flags/development/allow_archive_as_web_access_format.yml

----
-name: allow_archive_as_web_access_format
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/64471
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/334944
-milestone: '14.1'
-type: development
-group: group::release
-default_enabled: false

lib/gitlab/auth/auth_finders.rb

@@ -298,7 +298,7 @@ module Gitlab
         when :api
           api_request?
         when :archive
-          archive_request? if Feature.enabled?(:allow_archive_as_web_access_format, default_enabled: :yaml)
+          archive_request?
         end
       end
 

spec/lib/gitlab/auth/auth_finders_spec.rb

@@ -496,18 +496,6 @@ RSpec.describe Gitlab::Auth::AuthFinders do
       expect(find_user_from_web_access_token(:archive)).to eq(user)
     end
 
-    context 'when allow_archive_as_web_access_format feature flag is disabled' do
-      before do
-        stub_feature_flags(allow_archive_as_web_access_format: false)
-      end
-
-      it 'returns nil for ARCHIVE requests' do
-        set_header('SCRIPT_NAME', '/-/archive/main.zip')
-
-        expect(find_user_from_web_access_token(:archive)).to be_nil
-      end
-    end
-
     context 'for API requests' do
       it 'returns the user' do
         set_header('SCRIPT_NAME', '/api/endpoint')