Deprecate --build-option and --global-option

Author: sbidoul

news/11859.removal.rst

@@ -0,0 +1,2 @@
+Deprecate ``--build-option`` and ``--global-option``. Users are invited to switch to
+``--config-settings``.

src/pip/_internal/req/req_install.py

@@ -922,11 +922,17 @@ def check_legacy_setup_py_options(
     if not legacy_setup_py_options_present:
         return
 
+    deprecated(
+        reason="--build-option and --global-option are deprecated.",
+        issue=11859,
+        replacement="to use --config-settings",
+        gone_in="23.3",
+    )
+
     options.format_control.disallow_binaries()
     logger.warning(
         "Implying --no-binary=:all: due to the presence of "
         "--build-option / --global-option / --install-option. "
-        "Consider using --config-settings for more flexibility.",
     )
     if mode == LegacySetupPyOptionsCheckMode.INSTALL and has_install_options:
         if _install_option_ignored(options.install_options, reqs):