rsx: Minor surface cache improvements

[kd-11]

Fixes #11316

[Xcedf]

Fixes Assassin's Creed performance regression and it's log spam
master

PR

[kd-11]

Reworked things a bit. Now even with log spam and surface removal active the performance impact is very low from some quick testing. Got 35fps -> 60fps even with the removal spam active in prince of persia. I've also tweaked the thresholds again, needs a retest. I'll need to figure out which titles were affected by the removal and verify that they still work. I can only remember SSX.

[Xcedf]

Slower in AC with update
and log spams this single addr
E RSX: Stale surface at address 0xc2380000 will be deleted
E RSX: [Performance warning] Texture gather routine encountered too many objects! x3

[kd-11]

On one hand this is good, since we have almost double the fps even with aggressive cleanup. We just need to tune the algorithm so that the performance hit due to surface removal should never be greater than the performance hit of actually consuming all those sections.

[kd-11]

Added some new logic that tracks actual overdraw and is much easier to calibrate. Verify if everything is OK now.
Some games are having many small 2D tiles that constitute a large 2D texture and this was incorrectly triggering the overdraw detection when it really shouldn't have.

[Xcedf]

Got my performance back in AC, spams gone

[kd-11]

By the way, it seems AC spams zcull a lot, relaxed zcull should be optimal for such titles. Likely makes the performance difference more obvious.

[kd-11]

Actually I can also see zcull crap in prince of persia logs. Likely because the engine is related, same suggestion applies to that one.
I think this PR is good enough for now though, I'll leave it up for testing until tomorrow.

[Xcedf]

AC never spammed Zcull stuff for me, was using Relaxed all the way.