[Build System] Disable running 32bit iOS simulator by default

(cherry picked from commit 5e5a6ca)

Author: shahmishal

utils/build_swift/build_swift/driver_arguments.py

@@ -980,6 +980,7 @@ def create_argument_parser():
            help='skip testing iOS simulator targets')
     option('--skip-test-ios-32bit-simulator',
            toggle_false('test_ios_32bit_simulator'),
+           default=False,
            help='skip testing iOS 32 bit simulator targets')
     option('--skip-test-ios-host',
            toggle_false('test_ios_host'),