Adjust gameplay element maximum size limits for backwards compatibility

[bdach]

• Closes Skin inconsistency between release and master #24973

This PR adjusts the maximum allowable element sizes enforced in #24706 such that they affect a significantly smaller number of user skins.

The new limits were chosen by sampling across over 4000 skins, using data graciously provided by @RockRoller01. The methodology for doing so is described in this gist.

The nominal goals were:

• Keep the ratio of broken skins under 5%
• In osu!, I've heard several voices that people don't really care about skins blowing up the sprite sizes, since it wasn't really exploitable. So I was more than fine generally even doubling the max allowed size to keep the percentage of broken skins low.
• In taiko and catch, as there were numerous complaints and questions about putting a hard limit on gameplay element sizes to curb abuse, and thus I was a lot more stringent and generally only allowed up to about 25% slack (with the exception of droplets, which were generally the odd one out anyways, and so I've allowed them to be as large as a normal fruit).

The table below contains the full breakdown:

element	previous maximum	% of skins broken before	new maximum	% of skins broken after
hitcircle	128x128	12.26%	256x256	0.14%
sliderstartcircle	128x128	13.56%	256x256	0.90%
sliderendcircle	128x128	5.34%	256x256	1.73%
hitcircleoverlay	128x128	15.96%	256x256	0.13%
sliderstartcircleoverlay	128x128	15.51%	256x256	0.26%
sliderendcircleoverlay	128x128	4.90%	256x256	0.72%
reversearrow	128x128	36.47%	256x256	0.19%
sliderb	128x128	40.89%	384x384	0.53%
sliderb-nd	128x128	3.57%	384x384	3.57%
sliderb-spec	128x128	0.00%	384x384	0.00%
sliderfollowcircle	308x308	4.04%	384x384	1.52%
default-N	128x128	13.33%	320x320	0.03%
taikohitcircle	128x128	8.61%	160x160	3.84%
taikobigcircle	128x128	9.22%	160x160	2.99%
taikohitcircleoverlay	128x128	9.60%	160x160	2.71%
taikobigcircleoverlay	128x128	11.11%	160x160	3.24%
fruit-{bananas,pear,grapes,apple,orange}	128x128	7.59%	160x160	3.04%
fruit-{bananas,pear,grapes,apple,orange}-overlay	128x128	6.48%	160x160	3.15%
fruit-drop	82x103	34.45%	160x160	1.49%
fruit-drop-overlay	82x103	40.87%	160x160	1.62%

All dimensions are @1x. @2x elements are still allowed to be twice as big as limits above.

[bdach]

Applied some further changes based on feedback from @RockRoller01 (see discord conversation).

• default-N number sprites maximum size increased by 1.25x to a total of 320x320 to counteract the 0.8x factor applied onto them when displayed on a hitcircle.
• sliderb and parts' maximum size increased to 384x384, to match sliderfollowcircle, as the two are apparently sometimes used interchangeably by skinners to achieve different visual effects.

OP and gist therein updated with the newest changes.

[peppy]

Seems a bit terse but sure.