Tests: Fix RunCMake.CTest output match to tolerate line number changes

Tests/RunCMake/CTest/BeforeProject-stderr.txt

@@ -1,6 +1,6 @@
-CMake Error at .*/Modules/CTestTargets.cmake:20 \(message\):
+CMake Error at .*/Modules/CTestTargets.cmake:[0-9]+ \(message\):
   Do not include\(CTest\) before calling project\(\).
 Call Stack \(most recent call first\):
   .*/Modules/CTest.cmake:[0-9]+ \(include\)
-  BeforeProject.cmake:1 \(include\)
-  CMakeLists.txt:5 \(include\)
+  BeforeProject.cmake:[0-9]+ \(include\)
+  CMakeLists.txt:[0-9]+ \(include\)