Revert "test: fix GCC_PREPROCESSOR_DEFINITIONS from TEST/TESTCI to SENTRY_ prefix (getsentry#5541)"

This reverts commit 7908e84.

Author: philipsawyerdd

Samples/Shared/Config/ClangPreprocessing.xcconfig

@@ -8,8 +8,7 @@ ENABLE_NS_ASSERTIONS_Release = NO
 ENABLE_NS_ASSERTIONS = $(ENABLE_NS_ASSERTIONS_$(CONFIGURATION))
 
 GCC_PREPROCESSOR_DEFINITIONS_Debug = DEBUG=1 $(inherited)
-GCC_PREPROCESSOR_DEFINITIONS_DebugV9 = SDK_V9=1 DEBUG=1 $(inherited)
-GCC_PREPROCESSOR_DEFINITIONS_Test = SENTRY_TEST=1 $(inherited)
-GCC_PREPROCESSOR_DEFINITIONS_TestCI = SENTRY_TESTCI=1 $(inherited)
+GCC_PREPROCESSOR_DEFINITIONS_Test = TEST=1 $(inherited)
+GCC_PREPROCESSOR_DEFINITIONS_TestCI = TESTCI=1 $(inherited)
 GCC_PREPROCESSOR_DEFINITIONS_Release = RELEASE=1 $(inherited)
 GCC_PREPROCESSOR_DEFINITIONS = $(GCC_PREPROCESSOR_DEFINITIONS_$(CONFIGURATION))