Respect client's header table size settings

[JunTaoLuo]

Follow-up to aspnet/KestrelHttpServer#2816.

Currently our encoder does not do any header compression. If we decide to do response header compression, we will need to take into account the client's settings for header table size.

[JunTaoLuo]

Also related to https://github.com/aspnet/KestrelHttpServer/issues/2852

[JamesNK]

I'm doing this with #4715

[JamesNK]

I believe this has been done here:

aspnetcore/src/Servers/Kestrel/Core/src/Internal/Http2/Http2Connection.cs

Lines 746 to 753 in 2217e8e

	// Maximum HPack encoder size is limited by Http2Limits.HeaderTableSize, configured max the server.
	//
	// Note that the client HPack decoder doesn't care about the ACK so we don't need to lock sending the
	// ACK and updating the table size on the server together.
	// The client will wait until a size agreed upon by it (sent in SETTINGS_HEADER_TABLE_SIZE) and the
	// server (sent as a dynamic table size update in the next HEADERS frame) is received before applying
	// the new size.
	_frameWriter.UpdateMaxHeaderTableSize(Math.Min(_clientSettings.HeaderTableSize, (uint)Limits.Http2.HeaderTableSize));

@Tratcher @halter73