RFR: 8336940: Update GStreamer to 1.24.6

[Alexander Matveev]

- Updated GStreamer to 1.24.6 and Glib to 2.80.4.
- Testing done on all platforms with all supported formats.
- Removed gstpluginloader.c. This file contains additional plugin loading mechanism which we do not use. Latest GStreamer modified it heavily and it did not compile without pulling additional dependency from GLib, but since we do not use it anyway it was removed. Corresponding calls to gstpluginloader.c from gstregistry.c were disabled as well.
- Removed DSD support from Alsa audio sink. Latest GStreamer added support for Alsa DSD (Direct Stream Digital), but we do not use it so it was removed. Also, such support requires newer libasound2 (ALSA) which is not available on older Linux distributions.
- No other changes or bug fixes are done.

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Commit messages:
 - 8336940: Update GStreamer to 1.24.6 [v2]
 - 8336940: Update GStreamer to 1.24.6

Changes: https://git.openjdk.org/jfx/pull/1542/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1542&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8336940
  Stats: 24626 lines in 329 files changed: 13058 ins; 6878 del; 4690 mod
  Patch: https://git.openjdk.org/jfx/pull/1542.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1542/head:pull/1542

PR: https://git.openjdk.org/jfx/pull/1542