20710: Switch from pipes.quote to shlex.quote

20710: Switch from pipes.quote to shlex.quote

pipes is deprecated in Python 3.11+ and slated to be removed in Python
3.13. Fortunately we only use pipes.quote, which is literally the same
as shlex.quote:

    >>> import pipes
    <stdin>:1: DeprecationWarning: 'pipes' is deprecated and slated for removal in Python 3.13
    >>> import shlex
    >>> pipes.quote is shlex.quote
    True

Switch to that instead for continued support.

Arvados-DCO-1.1-Signed-off-by: Brett Smith <brett.smith@curii.com>