[python] Allow clients to define TLS Server name (SNI) (aiohttp)

[multani]

This configures the same as in #15283 but for the aiohttp backend.

Waiting for one of the following upstream aiohttp pull request to be merged before marking this pull request as ready:

• Support passing a custom server name parameter on HTTPS connection aio-libs/aiohttp#7541 (aiohttp 4.0.x)
• Support passing a custom server name parameter on HTTPS connection aio-libs/aiohttp#7543 (aiohttp 3.9.x)

This is extracted from tomplus/kubernetes_asyncio#270.

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