[release/2.3] Update triton-rocm.txt to tip of release/internal/2.3.x and conditionalize libamd_comgr.so.3 (#1962)

Relates to ROCm/triton#760

Was breaking this build:
http://rocm-ci.amd.com/blue/organizations/jenkins/pytorch-pipeline-manylinux-wheel-builder_rel-6.4/detail/pytorch-pipeline-manylinux-wheel-builder_rel-6.4/95/pipeline/714/

Validation:
http://rocm-ci.amd.com/job/pytorch2.3-manylinux-wheels_rel-6.4/15/

---------

Co-authored-by: Jithun Nair <[email protected]>

Author: ethanwee1

.ci/docker/ci_commit_pins/triton-rocm.txt

@@ -1 +1 @@
-5a02332983ee03f6727573120155d5ceb6c6376a
+14215a249b10f160a500120fea1737a7125722c0