Add volume control to Audio (#6254)
* fix autoplay and add trim_region_color setting
* add changeset
* add changeset
* add changeset
* remove unused param
* add changeset
* add volume control functionality
* add changeset
* corrent change event to stop_recording
* controls tweak
* add tests
* add changeset
* hide volume when blurred
* change bar height
* normalise -> normalize
* style tweaks
* clean up volume control
* add more tests
* formatting
* fix dispatch event
* amend refs to source
* add audio e2e
* add changeset
* fix test
* clean up ids + refs
* style tweak
---------
Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>
