Disable downstream project tests in smoke test trigger

Author: shahmishal

utils/build-presets.ini

@@ -662,6 +662,13 @@ skip-build-benchmarks
 # Skip playground tests
 skip-test-playgroundsupport
 
+# Skip downstream project tests
+skip-test-swiftsyntax
+skip-test-indexstore-db
+skip-test-sourcekit-lsp
+skip-test-swiftpm
+skip-test-llbuild
+
 [preset: buildbot_incremental,tools=RA,stdlib=RD,smoketest=macosx,flto]
 mixin-preset=buildbot_incremental,tools=RA,stdlib=RD,smoketest=macosx
 build-subdir=buildbot_incremental