quic: improve conn ID handling #11031

Job	Run time
ledgers / ledger-replay	8m 2s
ledgers / ledger-replay	8m 2s
firedancer / firedancer-localnet	6m 25s
firedancer / firedancer-localnet	6m 25s
tests / test (linux_gcc_noarch64)	1m 13s
tests / test (linux_gcc_noarch64)	1m 13s
tests / test (linux_gcc_x86_64)	6m 46s
tests / test (linux_gcc_x86_64)	1s
tests / test (linux_gcc_icelake)	7m 26s
tests / test (linux_gcc_icelake)	7m 26s
tests / test (linux_clang_x86_64)	7m 41s
tests / test (linux_clang_x86_64)	7m 41s
tests / test (linux_clang_icelake)	7m 34s
tests / test (linux_clang_icelake)	7m 34s
tests / test (native)	6m 1s
tests / test (native)	6m 1s
tests / test (native-no-agave)	3m 14s
tests / test (native-no-agave)	3m 14s
ledgers / ledger-coverage	0s
ledgers / ledger-coverage	0s
	1h 41m 59s

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