tests: move the disabling of 500 for hyper from CI to DISABLED

Follow-up to 136504195a

Closes #14551

.github/workflows/linux.yml

@@ -169,7 +169,6 @@ jobs:
           - name: hyper
             install_steps: rust hyper valgrind
             configure: LDFLAGS="-Wl,-rpath,$HOME/hyper/target/debug" --with-openssl --with-hyper=$HOME/hyper --enable-debug --enable-websockets
-            tflags: '!500'
             singleuse: --unit
 
           - name: rustls

tests/data/DISABLED

@@ -68,6 +68,7 @@
 # 1591, 1943. See https://github.com/hyperium/hyper/issues/2699 for details.
 %if hyper
 266
+500
 579
 587
 # 1021 re-added here due to flakiness