[5.5] Don't include tests for back deploy concurrency product

Addresses rdar://83777172

(cherry picked from commit 6fbc962)

Author: edymtt

utils/swift_build_support/swift_build_support/products/backdeployconcurrency.py

@@ -79,6 +79,7 @@ def build(self, host_target):
         self.cmake_options.define('SWIFT_BUILD_SDK_OVERLAY:BOOL', False)
         self.cmake_options.define('SWIFT_BUILD_DYNAMIC_SDK_OVERLAY:BOOL', False)
         self.cmake_options.define('SWIFT_BUILD_STATIC_SDK_OVERLAY:BOOL', False)
+        self.cmake_options.define('SWIFT_INCLUDE_TESTS:BOOL', False)
 
         self.cmake_options.define('SWIFT_HOST_VARIANT_ARCH:STRING', arch)
         self.cmake_options.define('BUILD_STANDALONE:BOOL', True)