chore(reflection): Refactor ServerReflectionInfoStream #3950

Job	Run time
rustfmt	14s
codegen	29s
clippy	50s
check (ubuntu-latest)	2m 7s
deny	17s
check (macOS-latest)	2m 35s
external-types	45s
check (windows-latest)	3m 58s
Interop Tests (ubuntu-latest)	36s
msrv	40s
Interop Tests (macOS-latest)	42s
semver	1m 10s
Interop Tests (windows-latest)	2m 32s
test (ubuntu-latest)	2m 33s
test (macOS-latest)	3m 13s
test (windows-latest)	4m 33s
udeps	4m 48s
	32m 2s

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