[Slider] Fix various tick mark issues

[eps1lon]

1. Fixes some tick marks being not active if the slider was not configured for the 0-100 range. Closes Slider mark formatting not honouring change to min/max values #16247
2. Fixes tick marks going out-of-bounds if min is not 0
3. Some internal polish (remove redundant tests, follow lint rules)

Testing first if 2 is caught by our regression tests.
It is not (because the mark is barely visible?) and therefore cropped from the screenshot.
You can verify it manually though by looking at the deployed demo: The very first discrete slider has a tick mark that has an offset to the left outside of the rail. I recommend a dark theme since it's barely visible in light mode.

[mui-pr-bot]

Details of bundle changes.

Comparing: 93f5b33...61a229a

bundle	parsed diff	gzip diff	prev parsed	current parsed	prev gzip	current gzip
@material-ui/core	0.00%	0.00%	319,010	319,010	87,576	87,576
@material-ui/core/Paper	0.00%	0.00%	68,281	68,281	20,353	20,353
@material-ui/core/Paper.esm	0.00%	0.00%	61,578	61,578	19,133	19,133
@material-ui/core/Popper	0.00%	0.00%	28,968	28,968	10,411	10,411
@material-ui/core/Textarea	0.00%	0.00%	5,513	5,513	2,374	2,374
@material-ui/core/TrapFocus	0.00%	0.00%	3,755	3,755	1,580	1,580
@material-ui/core/styles/createMuiTheme	0.00%	0.00%	16,012	16,012	5,791	5,791
@material-ui/core/useMediaQuery	0.00%	0.00%	2,597	2,597	1,102	1,102
@material-ui/lab	+0.02% 🔺	+0.02% 🔺	140,580	140,604	43,454	43,461
@material-ui/styles	0.00%	0.00%	51,703	51,703	15,337	15,337
@material-ui/system	0.00%	0.00%	15,303	15,303	4,342	4,342
Button	0.00%	0.00%	84,279	84,279	25,630	25,630
Modal	0.00%	0.00%	20,345	20,345	6,689	6,689
Slider	+0.03% 🔺	+0.02% 🔺	74,681	74,705	23,221	23,226
colorManipulator	0.00%	0.00%	3,904	3,904	1,544	1,544
docs.landing	0.00%	0.00%	55,232	55,232	13,946	13,946
docs.main	0.00%	0.00%	651,051	651,051	205,054	205,054
packages/material-ui/build/umd/material-ui.production.min.js	0.00%	0.00%	292,254	292,254	83,501	83,501

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