GH-104554: Add RTSPS support to `urllib/parse.py` (#104605)

* GH-104554: Add RTSPS support to `urllib/parse.py`

RTSPS is the permanent scheme defined in
https://www.iana.org/assignments/uri-schemes/uri-schemes.xhtml
alongside RTSP and RTSPU schemes.

* 📜🤖 Added by blurb_it.

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Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>