[Popover] Add warning when non-ref-holding component is used in Paper

[eps1lon]

Adds an additional warning to <Popover open PaperProps={{ component: () => <div />, elevation: 4 }} />. This would already trigger a warning in React. We improve the error message with elementTypeAcceptingRef

[mui-pr-bot]

Details of bundle changes.

Comparing: ae24eea...ad091d6

bundle	parsed diff	gzip diff	prev parsed	current parsed	prev gzip	current gzip
@material-ui/core	-0.00%	-0.00%	349,543	349,529	89,881	89,878
@material-ui/core/Paper	0.00%	0.00%	67,853	67,853	19,809	19,809
@material-ui/core/Paper.esm	0.00%	0.00%	60,184	60,184	18,558	18,558
@material-ui/core/Popper	0.00%	0.00%	34,825	34,825	11,883	11,883
@material-ui/core/styles/createMuiTheme	0.00%	0.00%	17,364	17,364	5,726	5,726
@material-ui/core/useMediaQuery	0.00%	0.00%	2,469	2,469	1,042	1,042
@material-ui/lab	0.00%	0.00%	147,331	147,331	43,555	43,555
@material-ui/styles	0.00%	0.00%	53,105	53,105	15,424	15,424
@material-ui/system	0.00%	0.00%	17,136	17,136	4,525	4,525
Button	0.00%	0.00%	87,919	87,919	26,055	26,055
Modal	0.00%	0.00%	82,035	82,035	24,553	24,553
colorManipulator	0.00%	0.00%	3,232	3,232	1,301	1,301
docs.landing	0.00%	0.00%	49,914	49,914	10,815	10,815
docs.main	-0.00%	0.00%	645,251	645,249	200,422	200,424
packages/material-ui/build/umd/material-ui.production.min.js	-0.00%	-0.00%	297,961	297,947	82,664	82,662

Generated by 🚫 dangerJS against ad091d6

[oliviertassinari]

Smart.