Merge pull request #14126 from jashook/use_new_x64_client

Add support for priority and update x64 client

diff --cc tests/scripts/arm64_post_build.py
index 96c5028,6fc9761..efb7be8
--- 1/tests/scripts/arm64_post_build.py
--- 2/tests/scripts/arm64_post_build.py
+++ b/tests/scripts/arm64_post_build.py
@@@ -249,9 -251,9 +251,10 @@@ def validate_args(args)
     valid_arches = ["arm", "arm64"]
     valid_testarches = ["arm", "armlb", "arm64"]
     valid_build_types = ["debug", "checked", "release"]
+    valid_priorities = ["0", "1"]
  
 -   valid_jit_stress_regs_numbers = ["1", "2", "3", "4", "8", "10", "80"]
 +   # Use the same naming scheme as netci.groovy, so, e.g., "0x10" instead of just "10".
 +   valid_jit_stress_regs_numbers = ["1", "2", "3", "4", "8", "0x10", "0x80", "0x1000"]
  
     jit_stress_scenarios = ["jitstress1", "jitstress2"]
     jitstressregs_scenarios = ["jitstressregs" + item for item in valid_jit_stress_regs_numbers]