Tests: Add case for unmatched cmake_policy({PUSH,POP})

Tests/RunCMake/PolicyScope/NotClosed-result.txt

+1

Tests/RunCMake/PolicyScope/NotClosed-stderr.txt

+^CMake Error at NotClosed.cmake:[0-9]+ \(include\):
+  cmake_policy PUSH without matching POP
+Call Stack \(most recent call first\):
+  CMakeLists.txt:[0-9]+ \(include\)$

Tests/RunCMake/PolicyScope/NotClosed.cmake

+cmake_policy(PUSH)

Tests/RunCMake/PolicyScope/NotOpened-result.txt

+1

Tests/RunCMake/PolicyScope/NotOpened-stderr.txt

+^CMake Error at NotOpened.cmake:[0-9]+ \(cmake_policy\):
+  cmake_policy POP without matching PUSH
+Call Stack \(most recent call first\):
+  CMakeLists.txt:[0-9]+ \(include\)$

Tests/RunCMake/PolicyScope/NotOpened.cmake

+cmake_policy(POP)

Tests/RunCMake/PolicyScope/RunCMakeTest.cmake

 include(RunCMake)
 
+run_cmake(NotClosed)
+run_cmake(NotOpened)
 run_cmake(parent-dir-generate-time)
 run_cmake(dir-in-macro-generate-time)