Add unit tests for abstract interpretation

OMR_ARCH_POWER flag is removed from fvtest/CMakeLists.txt.
Since now it contains tests also for non-arch platforms.

Tests including:
- Tests on getters and setters.
- Tests on clone operations.
- Tests on merge operations.
- Tests on push/pop operations of stack.

Issue: #5488

Signed-off-by: cijie xia <cijie@ualberta.ca>

fvtest/compilerunittest/CMakeLists.txt

@@ -41,6 +41,11 @@ if(OMR_ARCH_POWER)
 	)
 endif()
 
+
+list(APPEND COMPCGTEST_FILES
+	abstractinterpreter/AbsInterpreterTest.cpp
+)
+
 # MSVC and XL C/C++ have trouble with this file
 if (NOT OMR_TOOLCONFIG STREQUAL "msvc" AND NOT OMR_TOOLCONFIG STREQUAL "xlc")
 	list(APPEND COMPCGTEST_FILES