Remove many uses of QUIC_VERSION_99 in tests
This will allow us to deprecate QUIC_VERSION_99 soon.
gfe-relnote: n/a, test-only
PiperOrigin-RevId: 297933966
Change-Id: I5f161db41d8cb159c8342e61f5ff78f450c7cf4c
QUICHE (QUIC, Http/2, Etc) is Google‘s implementation of QUIC and related protocols. It powers Chromium as well as Google’s QUIC servers and some other projects.