Export Kokkos_<info> vars in KokkosConfig.cmake (#11545)

This makes the native Kokkos CMake build-system generated KokkosConfig.cmake
TriBITS-compliant for Kokkos itself.

This is needed by downstream packages downstream Trilinos packages like
Tpetra.

packages/kokkos/CMakeLists.txt

@@ -7,6 +7,10 @@ endif()
 
 if (COMMAND TRIBITS_PACKAGE)
   TRIBITS_PACKAGE(Kokkos)
+else()
+  INCLUDE(${CMAKE_CURRENT_LIST_DIR}/cmake/TribitsPkgExportCacheVars.cmake)
+  set(PACKAGE_NAME Kokkos)
+  tribits_pkg_init_exported_vars(Kokkos)
 endif()
 
 # We want to determine if options are given with the wrong case

packages/kokkos/cmake/KokkosConfig.cmake.in

@@ -62,3 +62,7 @@ ELSEIF(@Kokkos_ENABLE_CUDA@ AND NOT "separable_compilation" IN_LIST Kokkos_FIND_
 ENDIF()
 
 set(Kokkos_COMPILE_LANGUAGE @KOKKOS_COMPILE_LANGUAGE@)
+
+# Kokkos_<INFO> vars
+
+@KOKKOS_OPTION_SET_STATEMENTS_STR@

packages/kokkos/cmake/kokkos_functions.cmake

@@ -60,10 +60,8 @@ FUNCTION(kokkos_option CAMEL_SUFFIX DEFAULT TYPE DOCSTRING)
   # Make sure this appears in the cache with the appropriate DOCSTRING
   SET(${CAMEL_NAME} ${DEFAULT} CACHE ${TYPE} ${DOCSTRING})
 
-  IF (KOKKOS_HAS_TRILINOS)
-    IF (NOT CAMEL_NAME IN_LIST Kokkos_OPTIONS_NOT_TO_EXPORT)
-      TRIBITS_PKG_EXPORT_CACHE_VAR(${CAMEL_NAME})
-    ENDIF()
+  IF (NOT CAMEL_NAME IN_LIST Kokkos_OPTIONS_NOT_TO_EXPORT)
+    TRIBITS_PKG_EXPORT_CACHE_VAR(${CAMEL_NAME})
   ENDIF()
 
   #I don't love doing it this way because it's N^2 in number options, but c'est la vie

packages/kokkos/cmake/kokkos_install.cmake

@@ -6,6 +6,9 @@ IF (NOT KOKKOS_HAS_TRILINOS AND NOT Kokkos_INSTALL_TESTING)
   GET_PROPERTY(KOKKOS_PROP_LIBS GLOBAL PROPERTY KOKKOS_LIBRARIES_NAMES)
   SET(KOKKOS_LIBRARIES ${KOKKOS_PROP_LIBS})
 
+  tribits_pkg_append_set_commands_for_exported_vars(Kokkos
+    KOKKOS_OPTION_SET_STATEMENTS_STR)
+
   INCLUDE(CMakePackageConfigHelpers)
   CONFIGURE_PACKAGE_CONFIG_FILE(
     cmake/KokkosConfig.cmake.in