chore(server): Add ServerIoStream type #3696

Job	Run time
codegen	19s
rustfmt	9s
clippy	48s
check (ubuntu-latest)	1m 57s
Interop Tests (ubuntu-latest)	33s
Check MSRV	24s
check (macOS-latest)	1m 43s
Interop Tests (macOS-latest)	33s
test (ubuntu-latest)	2m 56s
Interop Tests (windows-latest)	2m 27s
check (windows-latest)	3m 43s
test (macOS-latest)	1m 27s
test (windows-latest)	5m 26s
check-external-types	26s
cargo-deny check	21s
semver	1m 12s
Check unused dependencies	4m 1s
	28m 25s

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