[ci] resolve shellcheck errors in .ci/check_python_dists.sh (#6503)

.ci/check_python_dists.sh

 #!/bin/sh
 
-set -e -E -u
+set -e -u
 
 DIST_DIR=${1}
 
@@ -24,7 +24,7 @@ if { test "${TASK}" = "bdist" || test "${METHOD}" = "wheel"; }; then
 fi
 
 PY_MINOR_VER=$(python -c "import sys; print(sys.version_info.minor)")
-if [ $PY_MINOR_VER -gt 7 ]; then
+if [ "$PY_MINOR_VER" -gt 7 ]; then
     echo "pydistcheck..."
     pip install 'pydistcheck>=0.7.0'
     if { test "${TASK}" = "cuda" || test "${METHOD}" = "wheel"; }; then
@@ -34,22 +34,22 @@ if [ $PY_MINOR_VER -gt 7 ]; then
             --ignore 'distro-too-large-compressed' \
             --max-allowed-size-uncompressed '100M' \
             --max-allowed-files 800 \
-            ${DIST_DIR}/* || exit 1
-    elif { test $(uname -m) = "aarch64"; }; then
+            "$(echo ${DIST_DIR}/*)" || exit 1
+    elif { test "$(uname -m)" = "aarch64"; }; then
         pydistcheck \
             --inspect \
             --ignore 'compiled-objects-have-debug-symbols' \
             --max-allowed-size-compressed '5M' \
             --max-allowed-size-uncompressed '15M' \
             --max-allowed-files 800 \
-            ${DIST_DIR}/* || exit 1
+            "$(echo ${DIST_DIR}/*)" || exit 1
     else
         pydistcheck \
             --inspect \
             --max-allowed-size-compressed '5M' \
             --max-allowed-size-uncompressed '15M' \
             --max-allowed-files 800 \
-            ${DIST_DIR}/* || exit 1
+            "$(echo ${DIST_DIR}/*)" || exit 1
     fi
 else
     echo "skipping pydistcheck (does not support Python 3.${PY_MINOR_VER})"