[Slider] Avoid mutating user's value prop

[elmeerr]

Spread array before applying sort to avoid mutating user's value props

Closes #17082

[mui-pr-bot]

Details of bundle changes.

Comparing: aa4e2db...08c1dfe

bundle	parsed diff	gzip diff	prev parsed	current parsed	prev gzip	current gzip
@material-ui/core	0.00%	0.00%	329,374	329,387	89,969	89,971
@material-ui/core/Paper	0.00%	0.00%	68,774	68,774	20,490	20,490
@material-ui/core/Paper.esm	0.00%	-0.01%	62,148	62,148	19,216	19,215
@material-ui/core/Popper	0.00%	0.00%	28,468	28,468	10,177	10,177
@material-ui/core/Textarea	0.00%	0.00%	5,094	5,094	2,137	2,137
@material-ui/core/TrapFocus	0.00%	0.00%	3,834	3,834	1,614	1,614
@material-ui/core/styles/createMuiTheme	0.00%	0.00%	16,386	16,386	5,829	5,829
@material-ui/core/useMediaQuery	0.00%	0.00%	2,541	2,541	1,058	1,058
@material-ui/lab	+0.01% 🔺	0.00%	153,227	153,240	46,689	46,690
@material-ui/styles	0.00%	+0.01% 🔺	51,492	51,492	15,305	15,307
@material-ui/system	0.00%	+0.21% 🔺	15,658	15,658	4,361	4,370
Button	0.00%	+0.02% 🔺	78,778	78,778	24,065	24,069
Modal	0.00%	+0.02% 🔺	14,346	14,346	5,010	5,011
Portal	0.00%	0.00%	2,907	2,907	1,319	1,319
Rating	0.00%	-0.00%	70,245	70,245	21,941	21,940
Slider	+0.02% 🔺	+0.02% 🔺	74,470	74,483	23,058	23,063
colorManipulator	0.00%	0.00%	3,904	3,904	1,543	1,543
docs.landing	0.00%	0.00%	53,510	53,510	13,855	13,855
docs.main	0.00%	0.00%	597,182	597,182	190,717	190,717
packages/material-ui/build/umd/material-ui.production.min.js	0.00%	-0.00%	300,298	300,302	86,412	86,411

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