Removing 'EXPERIMENTAL' from tiered compilation env var (#17283)

Things have progressed far enough that its time to use a friendlier name. The feature still still has performance aspects that need to be investigated and improved, but I don't want to scare people off simply because it isn't as fast as it could be.
This also updates to use a newer CoreFX version for JitBench since that appeared to be broken, and updated some comments and usage of the tieredcompilation variable.

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/runtest.sh b/tests/runtest.sh
index d0eea533d8..baa57e43b1 100755
--- a/tests/runtest.sh
+++ b/tests/runtest.sh
@@ -59,7 +59,7 @@ function print_usage {
     echo '    8: GC on every allowable NGEN instr   16: GC only on a unique stack trace'
     echo '  --long-gc                        : Runs the long GC tests'
     echo '  --gcsimulator                    : Runs the GCSimulator tests'
-    echo '  --tieredcompilation              : Runs the tests with COMPlus_EXPERIMENTAL_TieredCompilation=1'
+    echo '  --tieredcompilation              : Runs the tests with COMPlus_TieredCompilation=1'
     echo '  --link <ILlink>                  : Runs the tests after linking via ILlink'
     echo '  --show-time                      : Print execution sequence and running time for each test'
     echo '  --no-lf-conversion               : Do not execute LF conversion before running test script'
@@ -1127,7 +1127,7 @@ do
             export DoLink=true
             ;;
         --tieredcompilation)
-            export COMPlus_EXPERIMENTAL_TieredCompilation=1
+            export COMPlus_TieredCompilation=1
             ;;
         --jitdisasm)
             jitdisasm=1