Backport of "decodebin3: avoid identity, sinkpad, parsebin leakage when reset input" into 1.22
requested to merge tpm/gstreamer:mr-4664-backport-into-1.22-fix-identity-and-ghost-sinkpad-leakage into 1.22
Backport of !4664 (merged) "decodebin3: avoid identity, sinkpad, parsebin leakage when reset input".
Commits:
- 9f67b866 decodebin3: avoid identity, sinkpad, parsebin leakage when reset input