[CI] Use LLVM17 for tests on ci_cpu (#16931)

Changes the config script to build TVM with LLVM17. This enables tests
for #16921.

There was a failing codegen test when updating to LLVM 17, it seems it
stopped producing vectorized code with LLVM 16. I have checked the
same test with LLVM 18 and it now correctly produces vectorized code. I
made an attempt to track down the commit that fixed the issue in LLVM
but didn't have any success. Therefore, I think the best solution is
to skip the test until a more recent version of LLVM is used in CI.

Author: lhutton1

tests/python/relay/test_op_level2.py

@@ -1750,6 +1750,16 @@ def assembly(
         data_layout,
         kernel_layout,
     ):
+        if (
+            input_channels == 17
+            and output_channels == 29
+            and target == "llvm -mcpu=x86-64"
+            and tvm.target.codegen.llvm_version_major() in [16, 17]
+        ):
+            pytest.skip(
+                "Non divisible dims does not produce vectorized code when 15 < LLVM Version < 18."
+            )
+
         input_dtype, weight_dtype, output_dtype = dtypes
 
         image_size = (64, 64)

tests/scripts/task_config_build_cpu.sh

@@ -29,7 +29,7 @@ echo set\(USE_MICRO_STANDALONE_RUNTIME ON\) >> config.cmake
 echo set\(USE_PROFILER ON\) >> config.cmake
 echo set\(USE_DNNL ON\) >> config.cmake
 echo set\(USE_ARM_COMPUTE_LIB ON\) >> config.cmake
-echo set\(USE_LLVM \"/usr/bin/llvm-config-15 --link-static\"\) >> config.cmake
+echo set\(USE_LLVM \"/usr/bin/llvm-config-17 --link-static\"\) >> config.cmake
 echo set\(USE_NNPACK ON\) >> config.cmake
 echo set\(NNPACK_PATH /NNPACK/build/\) >> config.cmake
 echo set\(USE_ANTLR ON\) >> config.cmake