[preset] Use the system debugserver for buildbot_incremental,lldb_asan_ubsan

This addresses "this is a non-interactive debug session, could not get
permissions to debug" errors on the oss-lldb-asan-osx bot.

Author: vedantk

utils/build-presets.ini

@@ -494,6 +494,7 @@ build-subdir=buildbot_incremental_lldb_asan_ubsan
 # Build a sanitized lldb. Don't build a sanitized clang/swift.
 lldb
 lldb-extra-cmake-args=-DLLVM_USE_SANITIZER=Address;Undefined
+lldb-use-system-debugserver
 
 # Build Release with debug info, so that we can symbolicate backtraces.
 release-debuginfo