MINOR: quic: refactor buffered STREAM ACK consuming #3005

Job	Run time
Generate Build Matrix	4s
ubuntu-latest, gcc, no features	1m 11s
ubuntu-latest, gcc, all features	1m 48s
ubuntu-latest, gcc, ASAN, all features	2m 36s
ubuntu-latest, gcc, gz=zlib=1	1m 25s
ubuntu-latest, gcc, ssl=stock	1m 44s
ubuntu-latest, gcc, ssl=openssl=1.0.2u	1m 36s
ubuntu-latest, gcc, ssl=openssl=1.1.1s	1m 39s
ubuntu-latest, gcc, ssl=quictls=yes	3m 11s
ubuntu-latest, gcc, ssl=wolfssl=5.7.0	1m 37s
ubuntu-latest, gcc, ssl=aws_lc=1.29.0	1m 41s
ubuntu-latest, gcc, ssl=openssl=3.4.0-alpha1	1m 28s
ubuntu-latest, gcc, ssl=libressl=3.9.2	1m 40s
ubuntu-latest, clang, no features	1m 18s
ubuntu-latest, clang, all features	1m 52s
ubuntu-latest, clang, ASAN, all features	2m 21s
ubuntu-latest, clang, gz=zlib=1	1m 18s
ubuntu-latest, clang, ssl=stock	1m 46s
ubuntu-latest, clang, ssl=openssl=1.0.2u	1m 39s
ubuntu-latest, clang, ssl=openssl=1.1.1s	1m 44s
ubuntu-latest, clang, ssl=quictls=yes	3m 30s
ubuntu-latest, clang, ssl=wolfssl=5.7.0	1m 45s
ubuntu-latest, clang, ssl=aws_lc=1.29.0	1m 47s
ubuntu-latest, clang, ssl=openssl=3.4.0-alpha1	1m 40s
ubuntu-latest, clang, ssl=libressl=3.9.2	1m 43s
macos-14, clang, no features	1m 29s
	45m 32s

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