tvheadend: update to 2024-11-12, new options, patch for bug #26422

tvheadend: update to 2024-11-12, new options, patch for bug #26422

Changes:
- update to git master 2024-11-12 (dev stalled since then)
- patch for OpenWrt bug #26422 / tvheadend bug #1786
- Options removed:
  - imagecache = tvheadend doesn't support disabling it anymore
- Options added:
  - detailed (but slow) memory utilization reporting
  - Timeshift (default on)
  - tsfile (currently bugged in tvheadend, commented out / always on)
  - HDHomeRun server emulation (default on)
  - Digital Devices DVB CI descrambling cards (default off)
- RegEx options cleaned up, PCRE2 is the new default.
- Some help text improved

Signed-off-by: Marius Dinu <redacted>