hang when client receives header response that's too big in http2

**Version**
Hyper @ 7de02373f5e4ce392587a4d9d7710c6faf9c6165

**Platform**
`Linux 6.5.0-42-generic`

**Description**
When the server sends a response with headers that are too big, hyper can sometimes just hang. 

I wrote this test:

https://github.com/hyperium/hyper/blob/bdd112e9ea7df40bed65922faac68d77543e1763/tests/integration.rs#L64-L86

I expected to see an error. Instead the test just blocks forever.

See https://github.com/hyperium/tonic/issues/1834 and https://discord.com/channels/500028886025895936/1268954374634471484 for context.

	// Test that clients get responses when the server sends a response with
	// headers that are too large by just a bit.
	t! {
	long_header_response,
	client:
	request:
	;
	response:
	status: 500,
	headers: {
	},
	;
	server:
	request:
	;
	response:
	status: 500,
	headers: {
	// Just above DEFAULT_SETTINGS_MAX_HEADER_LIST_SIZE.
	"error" => ("a".repeat(16 << 10 + 1)),
	},
	;
	}

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hang when client receives header response that's too big in http2 #3724

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Uh oh!

hang when client receives header response that's too big in http2 #3724

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