(#13939) fmt: fix import location of cmake_layout for v2

* fmt: fix import location of `cmake_layout` for v2

* check cppstd since the default in v2 with apple-clang is too low

recipes/fmt/all/conanfile.py

@@ -1,9 +1,10 @@
 import os
 
 from conan import ConanFile
-from conan.tools.cmake import CMake, CMakeToolchain
+from conan.tools.cmake import CMake, CMakeToolchain, cmake_layout
 from conan.tools.files import apply_conandata_patches, copy, export_conandata_patches, get, rmdir
-from conan.tools.layout import basic_layout, cmake_layout
+from conan.tools.layout import basic_layout
+from conan.tools.build import check_min_cppstd
 from conan.tools.scm import Version
 
 required_conan_version = ">=1.52.0"
@@ -87,6 +88,10 @@ def package_id(self):
         else:
             del self.info.options.with_fmt_alias
 
+    def validate(self):
+        if self.info.settings.get_safe("compiler.cppstd"):
+            check_min_cppstd(self, 11)
+
     def source(self):
         get(self, **self.conan_data["sources"][self.version],
             destination=self.source_folder, strip_root=True)