Automation trigger info type hint improvements (#55402)

* Make automation trigger info a TypedDict

* zwave_js trigger type hint fixes

* Remove redundant automation trigger info field presence checks

* Use async_initialize_triggers in mqtt and tasmota device_trigger tests

homeassistant/helpers/trigger.py

@@ -3,7 +3,6 @@ from __future__ import annotations
 
 import asyncio
 import logging
-from types import MappingProxyType
 from typing import Any, Callable
 
 import voluptuous as vol
@@ -11,7 +10,7 @@ import voluptuous as vol
 from homeassistant.const import CONF_ID, CONF_PLATFORM
 from homeassistant.core import CALLBACK_TYPE, HomeAssistant, callback
 from homeassistant.exceptions import HomeAssistantError
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import ConfigType, TemplateVarsType
 from homeassistant.loader import IntegrationNotFound, async_get_integration
 
 _PLATFORM_ALIASES = {
@@ -62,15 +61,9 @@ async def async_initialize_triggers(
     name: str,
     log_cb: Callable,
     home_assistant_start: bool = False,
-    variables: dict[str, Any] | MappingProxyType | None = None,
+    variables: TemplateVarsType = None,
 ) -> CALLBACK_TYPE | None:
     """Initialize triggers."""
-    info = {
-        "domain": domain,
-        "name": name,
-        "home_assistant_start": home_assistant_start,
-        "variables": variables,
-    }
 
     triggers = []
     for idx, conf in enumerate(trigger_config):
@@ -78,7 +71,13 @@ async def async_initialize_triggers(
         trigger_id = conf.get(CONF_ID, f"{idx}")
         trigger_idx = f"{idx}"
         trigger_data = {"id": trigger_id, "idx": trigger_idx}
-        info = {**info, "trigger_data": trigger_data}
+        info = {
+            "domain": domain,
+            "name": name,
+            "home_assistant_start": home_assistant_start,
+            "variables": variables,
+            "trigger_data": trigger_data,
+        }
         triggers.append(platform.async_attach_trigger(hass, conf, action, info))
 
     attach_results = await asyncio.gather(*triggers, return_exceptions=True)