Xash3D FWGS Continuous master Build

vk: add a mechanism for exclusion of single surfaces from smoothing

Uses `_xvk_smoothing_excluded` field.

Surfaces can still be smoothed with a limited list of neightbours explicitly
by being included in a smoothing group.

Fixes #619

Xash3D FWGS Continuous imagelib-ktx2 Build

continuous-imagelib-ktx2

vk: show only `speeds.` metrics when doing `SPEEDS_BIT_STATS`(2)

Continuous build (E260)

GitHub Actions build log: https://github.com/w23/xash3d-fwgs/actions/runs/4853300416

Continuous build (emissive-textures-early-access)

GitHub Actions build log: https://github.com/w23/xash3d-fwgs/actions/runs/4823159282

Continuous build (E257-improve-materials)

GitHub Actions build log: https://github.com/w23/xash3d-fwgs/actions/runs/4822775900

Continuous build (disable-nswitch)

GitHub Actions build log: https://github.com/w23/xash3d-fwgs/actions/runs/4774386777

Continuous build (E256)

GitHub Actions build log: https://github.com/w23/xash3d-fwgs/actions/runs/4767900867

Continuous build (better-func_wall)

GitHub Actions build log: https://github.com/w23/xash3d-fwgs/actions/runs/4746840926

Continuous build (unfreeze-models)

GitHub Actions build log: https://github.com/w23/xash3d-fwgs/actions/runs/4709027581

Continuous build (shadow-culling)

GitHub Actions build log: https://github.com/w23/xash3d-fwgs/actions/runs/4706733459