Test to make sure a remote invite event over federation makes it to application service

[MadLittleMods]

Test to make sure a remote invite event over federation makes it to application service. The test seems to pass just fine and I see the invite event coming through.

Application service testing code based off of #221

---

Test to verify suspicions from Rocket.chat (internal link)

Dev notes

$ COMPLEMENT_ALWAYS_PRINT_SERVER_LOGS=1 COMPLEMENT_DIR=../complement ./scripts-dev/complement.sh -run TestFederationRoomsInvite

=== RUN   TestFederationRoomsInvite
2022/11/23 21:12:48 Sharing [SERVER_NAME=hs1 SYNAPSE_COMPLEMENT_DATABASE=sqlite SYNAPSE_COMPLEMENT_USE_WORKERS=] host environment variables with container
2022/11/23 21:12:56 Sharing [SERVER_NAME=hs2 SYNAPSE_COMPLEMENT_DATABASE=sqlite SYNAPSE_COMPLEMENT_USE_WORKERS=] host environment variables with container
2022/11/23 21:13:06 Sharing [SERVER_NAME=hs1 SYNAPSE_COMPLEMENT_DATABASE=sqlite SYNAPSE_COMPLEMENT_USE_WORKERS=] host environment variables with container
2022/11/23 21:13:06 Sharing [SERVER_NAME=hs2 SYNAPSE_COMPLEMENT_DATABASE=sqlite SYNAPSE_COMPLEMENT_USE_WORKERS=] host environment variables with container
    federation_rooms_invite_test.go:23: Deploy times: 17.222481177s blueprints, 5.593088383s containers
=== RUN   TestFederationRoomsInvite/Parallel
=== RUN   TestFederationRoomsInvite/Parallel/invite_event_over_federation_is_seen_by_application_service
=== PAUSE TestFederationRoomsInvite/Parallel/invite_event_over_federation_is_seen_by_application_service
=== CONT  TestFederationRoomsInvite/Parallel/invite_event_over_federation_is_seen_by_application_service
=== CONT  TestFederationRoomsInvite
    client.go:599: [CSAPI] POST hs1/_matrix/client/v3/createRoom => 200 OK (292.276838ms)
    client.go:599: [CSAPI] POST hs1/_matrix/client/v3/rooms/!rfFOcrkqVClrJZQTlY:hs1/invite => 200 OK (821.404146ms)
time="2022-11-23T21:13:12-06:00" level=error msg="Saw event on application service" content="{\"displayname\":\"Charlie\",\"membership\":\"invite\"}" event_id=m.room.member state_key="@charlie:hs2"
    client.go:599: [CSAPI] GET hs2/_matrix/client/v3/sync => 200 OK (41.11582ms)
    client.go:599: [CSAPI] GET hs2/_matrix/client/v3/sync => 200 OK (7.979624ms)
    client.go:599: [CSAPI] GET hs1/_matrix/client/v3/rooms/!rfFOcrkqVClrJZQTlY:hs1/state/m.room.name/ => 200 OK (6.67833ms)
    client.go:599: [CSAPI] GET hs1/_matrix/client/v3/rooms/!rfFOcrkqVClrJZQTlY:hs1/state/m.room.join_rules/ => 200 OK (8.409172ms)
time="2022-11-23T21:13:12-06:00" level=error msg=afewfeew eventIDsWeSawOverTransactions="[$TnreUvN6VRtR5c0B1hl7YDrGRrB1EeFhdFJIz_wxNRg]"
2022/11/23 21:13:14 ============================================

--- PASS: TestFederationRoomsInvite (25.73s)
    --- PASS: TestFederationRoomsInvite/Parallel (0.00s)
        --- PASS: TestFederationRoomsInvite/Parallel/invite_event_over_federation_is_seen_by_application_service (1.18s)
PASS
ok  	github.com/matrix-org/complement/tests	26.808s
2022/11/23 21:12:49 config: &{BaseImageURI:complement-synapse DebugLoggingEnabled:false AlwaysPrintServerLogs:true EnvVarsPropagatePrefix:PASS_ SpawnHSTimeout:30s KeepBlueprints:[] HostMounts:[] BaseImageURIs:map[] PackageNamespace:csapi CACertificate:0xc0012e4000 CAPrivateKey:0xc0000212c0 BestEffort:false HostnameRunningComplement:host.docker.internal}
testing: warning: no tests to run
PASS
ok  	github.com/matrix-org/complement/tests/csapi	1.970s [no tests to run]