Merge pull request #37672 from geetachavan1/cherrypicks_U0EBV

[r2.2:Cherrypick]Update PIP_BIN_PATH to work with all py versions.

tensorflow/tools/ci_build/builds/pip_new.sh

@@ -432,7 +432,7 @@ install_tensorflow_pip() {
   fi
 
   # Set path to pip.
-  PIP_BIN_PATH="$(which pip${PY_MAJOR_MINOR_VER})"
+  PIP_BIN_PATH="${PYTHON_BIN_PATH} -m pip"
 
   # Print python and pip bin paths
   echo "PYTHON_BIN_PATH to be used to install the .whl: ${PYTHON_BIN_PATH}"