[Backtracing] Disable for the minimal preset.

Disable backtracing for the minimal preset.

rdar://106459980

Author: al45tair

utils/build-presets.ini

@@ -2559,6 +2559,7 @@ swift-objc-interop=0
 swift-enable-dispatch=0
 swift-implicit-concurrency-import=0
 swift-stdlib-support-back-deployment=0
+swift-enable-backtracing=0
 swift-enable-reflection=0
 swift-stdlib-reflection-metadata=debugger-only
 swift-stdlib-stable-abi=0