Merge federationapi, federationsender, signingkeyserver components (#2055)

* Initial federation sender -> federation API refactoring

* Move base into own package, avoids import cycle

* Fix build errors

* Fix tests

* Add signing key server tables

* Try to fold signing key server into federation API

* Fix dendritejs builds

* Update embedded interfaces

* Fix panic, fix lint error

* Update configs, docker

* Rename some things

* Reuse same keyring on the implementing side

* Fix federation tests, `NewBaseDendrite` can accept freeform options

* Fix build

* Update create_db, configs

* Name tables back

* Don't rename federationsender consumer for now

build/docker/docker-compose.polylith.yml

@@ -54,15 +54,6 @@ services:
       - ./config:/etc/dendrite
     networks:
       - internal
-
-  federation_sender:
-    hostname: federation_sender
-    image: matrixdotorg/dendrite-polylith:latest
-    command: federationsender
-    volumes:
-      - ./config:/etc/dendrite
-    networks:
-      - internal
       
   key_server:
     hostname: key_server
@@ -72,16 +63,7 @@ services:
       - ./config:/etc/dendrite
     networks:
       - internal
-
-  signing_key_server:
-    hostname: signing_key_server
-    image: matrixdotorg/dendrite-polylith:latest
-    command: signingkeyserver
-    volumes:
-      - ./config:/etc/dendrite
-    networks:
-      - internal
-
+      
   user_api:
     hostname: user_api
     image: matrixdotorg/dendrite-polylith:latest