Overlays: allow any build mode for Go

We have a check that a traced language can only run overlay analysis
with build-mode: none, but Go does not currently declare support for
BMN, even though it has a similar autobuild mode that will work for
overlay analysis.

This commit adds a hard-coded exception to that check, allowing any
build mode for Go. This is intended as a short-term solution until Go
declares BMN support. It should be safe, since we can choose not to
enable the feature flag for Go repos using traced builds.

lib/init-action.js

@@ -87860,7 +87860,13 @@ async function getOverlayDatabaseMode(codeql, repository, features, languages, s
     return nonOverlayAnalysis;
   }
   if (buildMode !== "none" /* None */ && (await Promise.all(
-    languages.map(async (l) => await codeql.isTracedLanguage(l))
+    languages.map(
+      async (l) => l !== "go" /* go */ && // Workaround to allow overlay analysis for Go with any build
+      // mode, since it does not yet support BMN. The Go autobuilder and/or extractor will
+      // ensure that overlay-base databases are only created for supported Go build setups,
+      // and that we'll fall back to full databases in other cases.
+      await codeql.isTracedLanguage(l)
+    )
   )).some(Boolean)) {
     logger.warning(
       `Cannot build an ${overlayDatabaseMode} database because build-mode is set to "${buildMode}" instead of "none". Falling back to creating a normal full database instead.`

src/config-utils.ts

@@ -723,7 +723,14 @@ export async function getOverlayDatabaseMode(
     buildMode !== BuildMode.None &&
     (
       await Promise.all(
-        languages.map(async (l) => await codeql.isTracedLanguage(l)),
+        languages.map(
+          async (l) =>
+            l !== KnownLanguage.go && // Workaround to allow overlay analysis for Go with any build
+            // mode, since it does not yet support BMN. The Go autobuilder and/or extractor will
+            // ensure that overlay-base databases are only created for supported Go build setups,
+            // and that we'll fall back to full databases in other cases.
+            (await codeql.isTracedLanguage(l)),
+        ),
       )
     ).some(Boolean)
   ) {