Tests: Shorten paths in RunCMake.CompileFeatures

Shorten the NotAFeature_OriginDebug_target_compile_features case name to
avoid creating really long paths that fail with some tools on Windows.

Tests/RunCMake/CompileFeatures/NotAFeature_OriginDebug_target_compile_features-stderr.txt → Tests/RunCMake/CompileFeatures/NotAFeature_OriginDebugCommand-stderr.txt

@@ -1,4 +1,4 @@
-CMake Error at NotAFeature_OriginDebug_target_compile_features.cmake:4 \(target_compile_features\):
+CMake Error at NotAFeature_OriginDebugCommand.cmake:4 \(target_compile_features\):
   target_compile_features specified unknown feature "not_a_feature" for
   target "somelib".
 Call Stack \(most recent call first\):

Tests/RunCMake/CompileFeatures/RunCMakeTest.cmake

@@ -6,7 +6,7 @@ run_cmake(NotAFeatureTransitive)
 run_cmake(NotAFeature_OriginDebug)
 run_cmake(NotAFeature_OriginDebugGenex)
 run_cmake(NotAFeature_OriginDebugTransitive)
-run_cmake(NotAFeature_OriginDebug_target_compile_features)
+run_cmake(NotAFeature_OriginDebugCommand)
 
 run_cmake(generate_feature_list)
 file(READ