FPHSA: Add (failing) unit test in case a cache variable VERSION is present

Tests/RunCMake/FPHSA/FindPseudoNoVersionVar.cmake

+# pseudo find_module without specifying VERSION_VAR
+
+set(FOOBAR TRUE)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(PseudoNoVersionVar REQUIRED_VARS FOOBAR)

Tests/RunCMake/FPHSA/RunCMakeTest.cmake

@@ -9,7 +9,12 @@ run_cmake(BadFoundVar)
 set(RunCMake_TEST_OPTIONS "-DCMAKE_MODULE_PATH=${CMAKE_CURRENT_LIST_DIR}" "-DPseudo_VERSION=0")
 run_cmake(any_version_find_0)
 
-# Find a package with a more customary version number.
+# Find a package with more customary version number, without requestion a specific version and in
+# the presence of a cache variable VERSION.
+set(RunCMake_TEST_OPTIONS "-DCMAKE_MODULE_PATH=${CMAKE_CURRENT_LIST_DIR}" "-DPseudoNoVersionVar_VERSION=1.2.3.4.5_SHOULD_BE_IGNORED" "-DVERSION=BAD_VERSION")
+run_cmake(any_version_VERSION_cache_variable)
+
+# Find a package with a more customary version number, without requestion a specific version.
 set(RunCMake_TEST_OPTIONS "-DCMAKE_MODULE_PATH=${CMAKE_CURRENT_LIST_DIR}" "-DPseudo_VERSION=1.2.3.4.5")
 run_cmake(any_version)
 

Tests/RunCMake/FPHSA/any_version_VERSION_cache_variable-stdout.txt

+Found PseudoNoVersionVar: TRUE *
++

Tests/RunCMake/FPHSA/any_version_VERSION_cache_variable.cmake

+find_package(PseudoNoVersionVar REQUIRED)