[Snackbar] Remove transition onX props

[mbrookes]

Breaking change

• The onE* transition props were removed. Use TransitionProps instead.

  <Snackbar
  -  onEnter={onEnter}
  -  onEntered={onEntered},
  -  onEntering={onEntered},
  -  onExit={onEntered},
  -  onExited={onEntered},
  -  onExiting={onEntered}
  +  TransitionProps={{
  +    onEnter,
  +    onEntered,
  +    onEntering,
  +    onExit,
  +    onExited,
  +    onExiting,
  +  }}
  />

• I have followed (at least) the PR section of the contributing guide.

#17047 (comment)

[mui-pr-bot]

Details of bundle changes

Generated by 🚫 dangerJS against c96f6a7

[eps1lon]

Needs a yarn proptypes which I missed in my PR and then this should go green.

yarn docs:api