Backport of "gstd3d11window: fix memory leak" into 1.22
Backport of !4373 (merged) "gstd3d11window: fix memory leak".
Commits:
- d7d0c969 gstd3d11window: fix memory leak
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Backport of !4373 (merged) "gstd3d11window: fix memory leak".
Commits: