RFR: 8336940: Update GStreamer to 1.24.6 [v2]

[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.

Alexander Matveev has updated the pull request incrementally with one additional commit since the last revision:

  8336940: Update GStreamer to 1.24.6 [v3]

-------------

Changes:
  - all: https://git.openjdk.org/jfx/pull/1542/files
  - new: https://git.openjdk.org/jfx/pull/1542/files/8d505f81..1e5499a9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1542&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1542&range=00-01

  Stats: 4 lines in 1 file changed: 4 ins; 0 del; 0 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