Add EE fixtures to SeedFu path

Signed-off-by: Balasankar "Balu" C <balasankar@gitlab.com>

changelogs/unreleased/include-ee-fixtures.yml

+---
+title: Add EE fixtures to SeedFu list
+merge_request: 28241
+author:
+type: other

config/initializers/seed_fu.rb

+# frozen_string_literal: true
+if Gitlab.ee?
+  SeedFu.fixture_paths += %W[ee/db/fixtures ee/db/fixtures/#{Rails.env}]
+end