Make deprecated-init-param warnings recommend the preferred Service.Settings(...) pattern

Move the warning helper into AIService as _warn_init_param_moved_to_settings.
It now uses type(self).__name__ to produce messages like
"Use settings=AnthropicLLMService.Settings(model=...)" instead of the raw
settings class name "AnthropicLLMSettings(model=...)". Callers no longer need
to pass the settings class explicitly.

src/pipecat/services/gradium/stt.py

@@ -28,7 +28,7 @@ from pipecat.frames.frames import (
     VADUserStoppedSpeakingFrame,
 )
 from pipecat.processors.frame_processor import FrameDirection
-from pipecat.services.settings import NOT_GIVEN, STTSettings, _NotGiven, _warn_deprecated_param
+from pipecat.services.settings import NOT_GIVEN, STTSettings, _NotGiven
 from pipecat.services.stt_latency import GRADIUM_TTFS_P99
 from pipecat.services.stt_service import WebsocketSTTService
 from pipecat.transcriptions.language import Language, resolve_language
@@ -162,7 +162,7 @@ class GradiumSTTService(WebsocketSTTService):
 
         # 3. Apply params overrides — only if settings not provided
         if params is not None:
-            _warn_deprecated_param("params", self.Settings)
+            self._warn_init_param_moved_to_settings("params")
             if not settings:
                 default_settings.language = params.language
                 if params.delay_in_frames is not None: