Add initial blueprint support (#42469)

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>
Co-authored-by: Franck Nijhof <git@frenck.dev>

tests/components/automation/test_init.py

@@ -1232,3 +1232,25 @@ async def test_automation_variables(hass, caplog):
     hass.bus.async_fire("test_event_3", {"break": 0})
     await hass.async_block_till_done()
     assert len(calls) == 3
+
+
+async def test_blueprint_automation(hass, calls):
+    """Test blueprint automation."""
+    assert await async_setup_component(
+        hass,
+        "automation",
+        {
+            "automation": {
+                "use_blueprint": {
+                    "path": "test_event_service.yaml",
+                    "input": {
+                        "trigger_event": "blueprint_event",
+                        "service_to_call": "test.automation",
+                    },
+                }
+            }
+        },
+    )
+    hass.bus.async_fire("blueprint_event")
+    await hass.async_block_till_done()
+    assert len(calls) == 1