[jfx25u] RFR: 8366217: Update GStreamer to 1.26.5

[Alexander Matveev]

Clean backport of JDK-8366217.

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Commit messages:
 - Backport 613bbb146e42c0acb86b736e5097b33512841257

Changes: https://git.openjdk.org/jfx25u/pull/11/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx25u&pr=11&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366217
  Stats: 18884 lines in 166 files changed: 14131 ins; 2041 del; 2712 mod
  Patch: https://git.openjdk.org/jfx25u/pull/11.diff
  Fetch: git fetch https://git.openjdk.org/jfx25u.git pull/11/head:pull/11

PR: https://git.openjdk.org/jfx25u/pull/11