Allow known breaks in the version compatibility test

The version-compat job fails every pull request once master breaks
compatibility with the latest release on purpose. List those breaks in
scripts/version-compat-breaks.json keyed by the published version they
break against, each with a pr number and reason. Listed messages warn
instead of failing, connect skips the cluster test, entries for other
versions are ignored, and a listed message that did not change fails.

Add the two src changes from #1129 against 2.0.3 so master passes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/version-compat-breaks.json

@@ -0,0 +1,14 @@
+{
+	"2.0.3": {
+		"messages": {
+			"request FactorioVersionsRequest": {
+				"pr": 1129,
+				"reason": "Hosts send it while starting an instance, so a newer host cannot start instances on a 2.0.3 controller."
+			},
+			"request LatestReleasesRequest": {
+				"pr": 1129,
+				"reason": "Hosts send it while starting an instance that targets a release channel such as stable, which a 2.0.3 controller rejects."
+			}
+		}
+	}
+}