[Transition] Add easing prop to override default timing function

[jeferson-sb]

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

• Add easing (transition timing function) property to transition components to be able override the default style on enter and leave animations, similar to how timeout is set up.

<Zoom 
  easing={{
    enter: 'cubic-bezier(0.71, 0.11, 0.35, 1.28)',
    exit: 'cubic-bezier(1,.18,.74,1.03)',
   }}
>

• Update type definitions and related API docs

Fix #24980

[mui-pr-bot]

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[oliviertassinari]

I have updated the pull request to remove the change of default transitions. See https://material.io/design/motion/speed.html#easing for why the new defaults seem to be not be correct. I think that It's also outside of the scope of the problem we are trying to solve.

[jeferson-sb]

@oliviertassinari oh I didn't know that, thanks for the updates :)

[oliviertassinari]

I have added one test case to have a minimum of coverage on the approach.

Looking at how we test the transition helpers, something feels slitly wrong. We should probably abstract the tests as we do in describeConformance. Currently it seems that we have a lot of duplicated code. I don't see any reason for two different transitions to substantially have different behaviors.