Introduce QUIC_NO_EXPORT

This CL replaces the /*QUIC_EXPORT_PRIVATE*/ annotation with QUIC_NO_EXPORT and changes the presubmit to allow that.

QUIC_NO_EXPORT was added to Chromium via:
https://chromium-review.googlesource.com/c/chromium/src/+/1885392

gfe-relnote: n/a, comment-only change
PiperOrigin-RevId: 277332771
Change-Id: I2badefc67bae486e5908925daeecb6886b174532
diff --git a/quic/core/quic_arena_scoped_ptr.h b/quic/core/quic_arena_scoped_ptr.h
index 938ae71..92da3db 100644
--- a/quic/core/quic_arena_scoped_ptr.h
+++ b/quic/core/quic_arena_scoped_ptr.h
@@ -20,7 +20,7 @@
 namespace quic {
 
 template <typename T>
-class /*QUIC_EXPORT_PRIVATE*/ QuicArenaScopedPtr {
+class QUIC_NO_EXPORT QuicArenaScopedPtr {
   static_assert(QUIC_ALIGN_OF(T*) > 1,
                 "QuicArenaScopedPtr can only store objects that are aligned to "
                 "greater than 1 byte.");