…nt lights

Like with spot lights, resolution for each shadow map is computed every frame in order to fit all of them in the common shadow atlas.

Some of the current limitations:
- ShadowBias possibly needs more precise values
- FovBias possibly needs more precise values
- Unused shadow faces allocate a slot in the common shadow atlas
- Draw calls are generated even for shadow frustums that do not contain shadow casters
- Not tested: Standalone players
- Not tested: Dynamic scenes
- Not tested: Performances
- Not tested: Code path using Structured Buffers to pass shadow information to GPU (during shadow pass and lighting loop)
- Not tested: Deferred Renderer

Normal bias for point lights now behaves similarly as for spot lights

…- This makes point light shadows look closer to spot light shadows

…dow normal bias - This fixes the issue of shadows that changed when point light was rotated.

Built-In RP uses a similar approach to apply punctual light shadow normal bias. See UnityWorldSpaceLightDir called by UnityClipSpaceShadowCasterPos in UnityCG.cginc:
https://github.cds.internal.unity3d.com/unity/unity/commit/93015b67a6e1afdfe00867fdd3a336eaa835f54d#diff-c2818feb2f37e566cf36ca5cab57a99eR533
https://github.cds.internal.unity3d.com/unity/unity/blob/93015b67a6e1afdfe00867fdd3a336eaa835f54d/External/shaderlab/CGIncludes/UnityCG.cginc#L76

…er" code path

…s, to avoid missing shadows at cube face boundaries

…adow data to the lighting shaders + Fixed indexing issue when using non-shadow-casting additional light

Some known issues still happening:
- If only a single light in the scene is set to use soft shadows, all punctual light shadows will be soft (even if their setting is "Hard")
- Toggling setting "Soft Shadows" in UniversalRP asset also impacts shape of shadows from punctual light set to cast "Hard Shadows"

…salGraphicsTest suite

…ot light shadow's Normal Bias to match reference image - Since revision ed8fcbe Normal Bias is applied using actual spot light direction

… use per-vertex light direction when applying shadow normal bias)

… of Hard Shadows"

…t to ScriptableRenderContext.DrawShadows - Reduces the number of shadow casters rendered to the shadow map

See also native-side changes introduced for Persistent Intermediate Renderer:
https://github.cds.internal.unity3d.com/unity/unity/commit/89f4e3b
https://github.cds.internal.unity3d.com/unity/unity/commit/fbe6025
https://github.cds.internal.unity3d.com/unity/unity/commit/8652678

…rors

…dditional light shadows

Test fails if "hard shadows" setting is replaced by "soft shadows" setting
Test fails if "soft shadows" setting is replaced by "hard shadows" setting
Test fails if "no shadows" setting is replaced by "shadows" setting
Test fails if one of the punctual lights in the scene is not rendered