Initial orjson support take 3 (#73849)

* Initial orjson support take 2

Still need to work out problem building wheels

--

Redux of #72754 / #32153 Now possible since the following is solved:
ijl/orjson#220 (comment)

This implements orjson where we use our default encoder.  This does not implement orjson where `ExtendedJSONEncoder` is used as these areas tend to be called far less frequently.  If its desired, this could be done in a followup, but it seemed like a case of diminishing returns (except maybe for large diagnostics files, or traces, but those are not expected to be downloaded frequently).

Areas where this makes a perceptible difference:
- Anything that subscribes to entities (Initial subscribe_entities payload)
- Initial download of registries on first connection / restore
- History queries
- Saving states to the database
- Large logbook queries
- Anything that subscribes to events (appdaemon)

Cavets:
orjson supports serializing dataclasses natively (and much faster) which
eliminates the need to implement `as_dict` in many places
when the data is already in a dataclass. This works
well as long as all the data in the dataclass can also
be serialized. I audited all places where we have an `as_dict`
for a dataclass and found only backups needs to be adjusted (support for `Path` needed to be added for backups).  I was a little bit worried about `SensorExtraStoredData` with `Decimal` but it all seems to work out from since it converts it before it gets to the json encoding cc @dgomes

If it turns out to be a problem we can disable this
with option |= [orjson.OPT_PASSTHROUGH_DATACLASS](https://github.com/ijl/orjson#opt_passthrough_dataclass) and it
will fallback to `as_dict`

Its quite impressive for history queries
<img width="1271" alt="Screen_Shot_2022-05-30_at_23_46_30" src="https://user-images.githubusercontent.com/663432/171145699-661ad9db-d91d-4b2d-9c1a-9d7866c03a73.png">

* use for views as well

* handle UnicodeEncodeError

* tweak

* DRY

* DRY

* not needed

* fix tests

* Update tests/components/http/test_view.py

* Update tests/components/http/test_view.py

* black

* templates

homeassistant/helpers/aiohttp_client.py

@@ -14,6 +14,7 @@ from aiohttp import web
 from aiohttp.hdrs import CONTENT_TYPE, USER_AGENT
 from aiohttp.web_exceptions import HTTPBadGateway, HTTPGatewayTimeout
 import async_timeout
+import orjson
 
 from homeassistant import config_entries
 from homeassistant.const import EVENT_HOMEASSISTANT_CLOSE, __version__
@@ -97,6 +98,7 @@ def _async_create_clientsession(
     """Create a new ClientSession with kwargs, i.e. for cookies."""
     clientsession = aiohttp.ClientSession(
         connector=_async_get_connector(hass, verify_ssl),
+        json_serialize=lambda x: orjson.dumps(x).decode("utf-8"),
         **kwargs,
     )
     # Prevent packages accidentally overriding our default headers