Change IETF Frame/QUIC_VERSION_99 tests to be symbolic.

This CL replaces checks for QUIC_VERSION_99 that are controlling the IETF frames and their associated functionality with a function call . The function has a name that is indicative of the features for which the version is being checked -- VersionHasIetfQuicFrames().

gfe-relnote: N/A just changes the text by which we test if IETF QUIC has been negotiated.
PiperOrigin-RevId: 253767805
Change-Id: I08ae6738411ac151f90d5d085ea69af90d79fb80
diff --git a/quic/test_tools/quic_test_utils.cc b/quic/test_tools/quic_test_utils.cc
index 100f4e9..dbfca44 100644
--- a/quic/test_tools/quic_test_utils.cc
+++ b/quic/test_tools/quic_test_utils.cc
@@ -1185,7 +1185,7 @@
                                Perspective perspective,
                                bool is_incoming,
                                StreamType default_type) {
-  return version == QUIC_VERSION_99
+  return VersionHasIetfQuicFrames(version)
              ? QuicUtils::GetStreamType(id, perspective, is_incoming)
              : default_type;
 }