#2268: move JSON validation to clang-16 build

Use a build based on Ubuntu 24.04 to ensure recent versions of Python
dependencies (python3-schema).

Author: cz4rs

ci/azure/azure-clang-16-ubuntu-mpich.yml

@@ -2,7 +2,7 @@
 ############## Warning this is a generated file---do not modify ###############
 ###############################################################################
 
-name: PR tests (clang-16, ubuntu, mpich)
+name: PR tests (clang-16, ubuntu, mpich, json schema test)
 
 trigger:
   branches:
@@ -58,7 +58,7 @@ variables:
   VT_KOKKOS_ENABLED: 0
   VT_TV_ENABLED: 0
   CMAKE_CXX_STANDARD: 17
-  VT_CI_TEST_LB_SCHEMA: 0
+  VT_CI_TEST_LB_SCHEMA: 1
   RUN_FULL_CI: true
   CACHE: "$(Agent.TempDirectory)/cache/"
   cache_name: ubuntu-clang-16-cache

ci/azure/azure-gcc-9-ubuntu-mpich.yml

@@ -2,7 +2,7 @@
 ############## Warning this is a generated file---do not modify ###############
 ###############################################################################
 
-name: PR tests (gcc-9, ubuntu, mpich, zoltan, json schema test)
+name: PR tests (gcc-9, ubuntu, mpich, zoltan)
 
 trigger:
   branches:
@@ -58,7 +58,7 @@ variables:
   VT_KOKKOS_ENABLED: 0
   VT_TV_ENABLED: 0
   CMAKE_CXX_STANDARD: 17
-  VT_CI_TEST_LB_SCHEMA: 1
+  VT_CI_TEST_LB_SCHEMA: 0
   RUN_FULL_CI: true
   CACHE: "$(Agent.TempDirectory)/cache/"
   cache_name: ubuntu-gcc-9-cache

scripts/workflows-azure.ini

@@ -100,11 +100,10 @@ vt_tests_num_nodes = 4
 vt_external_fmt = 1
 
 [PR-tests-gcc-9]
-test_configuration = "gcc-9, ubuntu, mpich, zoltan, json schema test"
+test_configuration = "gcc-9, ubuntu, mpich, zoltan"
 compiler_type = gnu
 compiler = gcc-9
 output_name = ci/azure/azure-gcc-9-ubuntu-mpich.yml
-vt_ci_test_lb_schema = 1
 vt_zoltan = 1
 
 [PR-tests-gcc-10]
@@ -212,11 +211,12 @@ vt_trace = 1
 vt_debug_verbose = 1
 
 [PR-tests-clang-16]
-test_configuration = "clang-16, ubuntu, mpich"
+test_configuration = "clang-16, ubuntu, mpich, json schema test"
 compiler_type = clang
 compiler = clang-16
 distro = 24.04
 output_name = ci/azure/azure-clang-16-ubuntu-mpich.yml
+vt_ci_test_lb_schema = 1
 vt_trace = 1
 
 [PR-tests-gcc-10-spack-package]