GS/HW: Add all levels/unclamped mipmap modes,credit by stenzek

[crashGG]

Description of Changes

This PR brings back the mipmapping dropdown (oh noes), but it does not bring back basic (phew).

It adds two new modes:

All Levels
Instead of creating TC sources with LODs M..MXL, where M is the highest LOD from the vertex trace, it always uploads mip levels 0..MXL. This should have the result of producing fewer duplicate textures when dumping, and potentially increase TC efficiency, since there's less duplicates in the hash cache too.

Unclamped
This is a new, enhanced mode, that uses the full range of texture LODs that the game provides, but ignores the L/K values/game's bias. This results in higher-resolution textures being used when upscaling, and makes anisotropic filtering work again without requiring forced trilinear.

Rationale behind Changes
New enhancement for improved visuals in games, because forcing mipmapping everywhere was actually a visual regression in some cases.

credit by stenzek

Suggested Testing Steps

Burnout 3, Need for speed 6 ,and other racing games with super long viewing distance

[F0bes]

Do you have permission by Stenzek to take his previous work and open a pr for it?

[crashGG]

1.This code complies with the GPL-3.0 license.
2.I do not have the authorship of this code, I have stated that the authorship belongs to Stenzek.
3.Once a code is created, it is like a digital life. Unless it violates the law or license, it should not be deprived of its freedom.
4.Our common goal is to make pcsx2 better. If you don't like it, you can reject this PR. We can also understand you and not make similar PRs.

[F0bes]

I'd rather try be on good terms with notable people than sit in a circle and yell about the GPL. It's better to make friends than enemies.

To add on: Stenzek has been clear he did not want his code reused and I would rather avoid any issues related to that.