Replace periodic tasks with background tasks (#112726)

* Phase out periodic tasks

* false by default or some tests will block forever, will need to fix each one manually

* kwarg works

* kwarg works

* kwarg works

* fixes

* fix more tests

* fix more tests

* fix lifx

* opensky

* pvpc_hourly_pricing

* adjust more

* adjust more

* smarttub

* adjust more

* adjust more

* adjust more

* adjust more

* adjust

* no eager executor

* zha

* qnap_qsw

* fix more

* fix fix

* docs

* its a wrapper now

* add more coverage

* coverage

* cover all combos

* more fixes

* more fixes

* more fixes

* remaining issues are legit bugs in tests

* make tplink test more predictable

* more fixes

* feedreader

* grind out some more

* make test race safe

* one more

tests/components/command_line/test_switch.py

@@ -350,7 +350,7 @@ async def test_switch_command_state_fail(
     await hass.async_block_till_done()
 
     async_fire_time_changed(hass, dt_util.utcnow() + SCAN_INTERVAL)
-    await hass.async_block_till_done()
+    await hass.async_block_till_done(wait_background_tasks=True)
 
     entity_state = hass.states.get("switch.test")
     assert entity_state
@@ -734,7 +734,7 @@ async def test_availability(
     hass.states.async_set("sensor.input1", "on")
     freezer.tick(timedelta(minutes=1))
     async_fire_time_changed(hass)
-    await hass.async_block_till_done()
+    await hass.async_block_till_done(wait_background_tasks=True)
 
     entity_state = hass.states.get("switch.test")
     assert entity_state
@@ -745,7 +745,7 @@ async def test_availability(
     with mock_asyncio_subprocess_run(b"50\n"):
         freezer.tick(timedelta(minutes=1))
         async_fire_time_changed(hass)
-        await hass.async_block_till_done()
+        await hass.async_block_till_done(wait_background_tasks=True)
 
     entity_state = hass.states.get("switch.test")
     assert entity_state