Fix httpx client creating a new ssl context with each client (memory leak) (#90191)
* Fix httpx client creating a new ssl context with each client
While working on https://github.com/home-assistant/core/issues/83524
it was discovered that each new httpx client creates a new ssl context
f1157dbc41/httpx/_transports/default.py (L261)
If an ssl context is passed in creating a new one is avoided here
f1157dbc41/httpx/_config.py (L110)
This change makes httpx ssl no-verify behavior match aiohttp ssl no-verify
behavior
6da04694fd/aiohttp/connector.py (L892)
aiohttp solved this by wrapping the code that generates the ssl context
in an lru_cache
* compact
1f2268a878