Remove quotes from around the extension param in register_extension_info

Tested:
    TAP --sample ran all affected tests and none failed

PiperOrigin-RevId: 613403452

src/bazel/qt.bzl

@@ -55,7 +55,7 @@ def mozc_cc_qt_library(name, deps = [], **kwargs):
     )
 
 register_extension_info(
-    extension = "mozc_cc_qt_library",
+    extension = mozc_cc_qt_library,
     label_regex_for_dep = "{extension_name}",
 )
 
@@ -71,7 +71,7 @@ def mozc_cc_qt_binary(name, deps = [], **kwargs):
     )
 
 register_extension_info(
-    extension = "mozc_cc_qt_binary",
+    extension = mozc_cc_qt_binary,
     label_regex_for_dep = "{extension_name}",
 )
 
@@ -159,6 +159,6 @@ def mozc_macos_qt_application(name, bundle_name, deps):
     )
 
 register_extension_info(
-    extension = "mozc_macos_qt_application",
+    extension = mozc_macos_qt_application,
     label_regex_for_dep = "{extension_name}",
 )