[CI] Pass local python version explicitly to pre-commit mypy.sh (#12224)

Signed-off-by: Chen Zhang <zhangch99@outlook.com>

tools/mypy.sh

@@ -1,12 +1,16 @@
 #!/bin/bash
 
 CI=${1:-0}
-PYTHON_VERSION=${2:-3.9}
+PYTHON_VERSION=${2:-local}
 
 if [ "$CI" -eq 1 ]; then
     set -e
 fi
 
+if [ $PYTHON_VERSION == "local" ]; then
+    PYTHON_VERSION=$(python -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")')
+fi
+
 run_mypy() {
     echo "Running mypy on $1"
     if [ "$CI" -eq 1 ] && [ -z "$1" ]; then