Build System: Extract validate_arch helper function

Signed-off-by: Yevhen Babiichuk (DustDFG) <dfgdust@gmail.com>

platform/ios/detect.py

@@ -3,6 +3,7 @@ import sys
 from typing import TYPE_CHECKING
 
 from methods import detect_darwin_sdk_path, print_error, print_warning
+from platform_methods import validate_arch
 
 if TYPE_CHECKING:
     from SCons.Script.SConscript import SConsEnvironment
@@ -60,12 +61,7 @@ def get_flags():
 def configure(env: "SConsEnvironment"):
     # Validate arch.
     supported_arches = ["x86_64", "arm64"]
-    if env["arch"] not in supported_arches:
-        print_error(
-            'Unsupported CPU architecture "%s" for iOS. Supported architectures are: %s.'
-            % (env["arch"], ", ".join(supported_arches))
-        )
-        sys.exit(255)
+    validate_arch(env["arch"], get_name(), supported_arches)
 
     ## LTO