virtest: prevent out-of-order build/test (#26944)

Use of `-R` flag to CTest command causes "empty-14" test to run,
by matching "empty", before the empty-14 target is built.

Patch CTest command in buildscript to match name exactly.

var/spack/repos/builtin/packages/virtest/package.py

@@ -17,6 +17,11 @@ class Virtest(CMakePackage):
 
     version('master', branch='master')
 
+    def patch(self):
+        script = FileFilter('tests/CMakeLists.txt')
+        script.filter(r' *\${CMAKE_CTEST_COMMAND} -V -R \${target}',
+                      '${CMAKE_CTEST_COMMAND} -V -R "^${target}$"')
+
     def setup_run_environment(self, env):
         env.prepend_path('CPATH', self.prefix.include.vir)