feat: introduce extended integration tests

- test both FLOSS and non-floss builds
- test on Synapse, Dendrite and Conduit
- remove Synapse-specific test
- add static Release mode app launch test

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

scripts/integration-server-conduit.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+ docker run -d \
+  -e CONDUIT_SERVER_NAME="localhost" \
+  -e CONDUIT_PORT="8008" \
+  -e CONDUIT_DATABASE_BACKEND="rocksdb" \
+  -e CONDUIT_ALLOW_REGISTRATION=true \
+  -e CONDUIT_ALLOW_FEDERATION=true \
+  -e CONDUIT_MAX_REQUEST_SIZE="20000000" \
+  -e CONDUIT_TRUSTED_SERVERS="[\"conduit.rs\"]" \
+  -e CONDUIT_MAX_CONCURRENT_REQUESTS="100" \
+  -e CONDUIT_LOG="info,rocket=off,_=off,sled=off" \
+  --name conduit -p 8008:8008 matrixconduit/matrix-conduit:latest
+
+sleep 20