feat(federation): add scenario-gotosocial setup and teardown (#1275)

3/5 taken out of #1269

This patch adds the setup and teardown of GoToSocial for use in the end-to-end tests

Reviewed-on: https://code.forgejo.org/forgejo/end-to-end/pulls/1275
Reviewed-by: earl-warren <earl-warren@noreply.code.forgejo.org>
Reviewed-by: Beowulf <beowulf@beocode.eu>
Co-authored-by: famfo <famfo@famfo.xyz>
Co-committed-by: famfo <famfo@famfo.xyz>

federation/federation.sh

@@ -79,6 +79,7 @@ function test_federation() {
         scenarios=(
             "star 7.1"
             "mastodon 14.0"
+            "gotosocial 14.0"
         )
 
         for scenario_version_str in "${scenarios[@]}"; do