build: AUT-2524 bump MCore main to a98aed55 (#6438)

Signed-off-by: svcnemo-autobot <svcnemo-autobot@nvidia.com>

Author: svcnemo-autobot

.main.commit

@@ -1 +1 @@
-8c815a4c98725726d27358847d291288b736f6bd
+a98aed553e25b4e86c59f50be54ac0ea4227b442

3rdparty/Megatron-LM

@@ -15,9 +15,11 @@
 #!/bin/bash
 set -xeuo pipefail # Exit immediately if a command exits with a non-zero status
 
+REPO_ROOT=$(cd "$(dirname "$0")/../../../../.." && pwd)
+
 export CUDA_VISIBLE_DEVICES="0,1"
 
-uv run coverage run --data-file=/opt/Megatron-Bridge/.coverage --source=/opt/Megatron-Bridge/ --parallel-mode -m pytest \
+uv run coverage run --data-file="${REPO_ROOT}/.coverage" --source="${REPO_ROOT}" --parallel-mode -m pytest \
   -o log_cli=true -o log_cli_level=INFO -v -s -x -m "not pleasefixme" --tb=short -rA \
   tests/functional_tests/test_groups/models/bert/test_bert_conversion.py
 coverage combine -q