cmake_language: Rename command from cmake_command

Also rename the `INVOKE` signature to `CALL`.

Fixes: #20732

Source/cmCMakeLanguageCommand.h

@@ -0,0 +1,20 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cmCMakeLanguageCommand_h
+#define cmCMakeLanguageCommand_h
+
+#include "cmConfigure.h" // IWYU pragma: keep
+
+#include <vector>
+
+class cmExecutionStatus;
+struct cmListFileArgument;
+
+/**
+ * \brief Calls a scripted or build-in command
+ *
+ */
+bool cmCMakeLanguageCommand(std::vector<cmListFileArgument> const& args,
+                            cmExecutionStatus& status);
+
+#endif