message: test: Set test directory to be writable before writing into it
  Move chmod permissions for writing to new directory before executing printfs to verify text value treatment in the subdirectory.
  Risk Level: Low
  Testing: bazel test //test/common/runtime:runtime_impl_test
  Docs Changes: N/A
  Release Notes: N/A
diff: @@ -9,10 +9,10 @@ cd "${TEST_SRCDIR}/envoy"
  rm -rf "${TEST_TMPDIR}/${TEST_DATA}"
  mkdir -p "${TEST_TMPDIR}/${TEST_DATA}"
  cp -RfL "${TEST_DATA}"/* "${TEST_TMPDIR}/${TEST_DATA}"
  +chmod -R u+rwX "${TEST_TMPDIR}/${TEST_DATA}"
  # Verify text value is treated as a binary blob regardless of source line-ending settings
  printf "hello\nworld" > "${TEST_TMPDIR}/${TEST_DATA}/root/envoy/file_lf"
  printf "hello\r\nworld" > "${TEST_TMPDIR}/${TEST_DATA}/root/envoy/file_crlf"
  -chmod -R u+rwX "${TEST_TMPDIR}/${TEST_DATA}"
  # Deliberate symlink of doom.
  LOOP_PATH="${TEST_TMPDIR}/${TEST_DATA}/loop"
  