Steps to reproduce:
1. Open the attached project "StrictVariantRepro.zip"
2. Open the "SampleScene" scene
3. Enter Play Mode and observe that the scene renders correctly
4. Open File > Build Profiles and make sure "Development Build" is enabled
5. Make sure "Strict Shader Variant Matching" is enabled in Player Settings
6. Build and Run the Windows Player
7. Open the Player.log and search for "_ADDITIONAL_LIGHT_SHADOWS"

Actual result: URP/Lit ForwardLit variants containing _ADDITIONAL_LIGHT_SHADOWS are requested and not found, for every transparent draw, every frame
Expected result: No variant containing _ADDITIONAL_LIGHT_SHADOWS is requested, because Additional Light Shadows are disabled in the URP Asset and those variants were stripped

Reproducible with: 6000.0.85f1, 6000.2.0a10 (a07df2efa5a1), 6000.3.24f1, 6000.6.2f1, 6000.7.0b1, 7000.0.0a1
Not reproducible with: 6000.2.0a9 (2aeb7e9a02a2)

Testing Environment: Windows 11
Not reproducible on: no other environment tested

Notes:
-Issue is reproducible on a fresh URP 3D Template project
-Only reproducible when the renderer's Rendering Path is set to Deferred. Forward and Forward+ are not affected
-ShaderBuildPreprocessor computes needsAdditionalLightShadows = supportsAdditionalLightShadows && (PerPixel || ForwardPlus), which evaluates to false when "Cast Shadows" is disabled, so every _ADDITIONAL_LIGHT_SHADOWS variant is stripped
-Possible fix in com.unity.render-pipelines.universal/Runtime/Passes/AdditionalLightsShadowCasterPass.cs:706: shadowData.isKeywordAdditionalLightShadowsEnabled = shadowsEnabled;
-With "Strict Shader Variant Matching" disabled the errors are silent, but Unity substitutes a different variant, so transparents render with a mismatched shadow keyword state
-Shader variant error (important part is for the _ADDITIONAL_LIGHT_SHADOWS to b e present in the log):
Shader Universal Render Pipeline/Lit, subshader 0, pass 0, stage pixel: variant DIRLIGHTMAP_COMBINED LIGHTMAP_ON SHADOWS_SHADOWMASK _ADDITIONAL_LIGHTS _ADDITIONAL_LIGHT_SHADOWS _ALPHAPREMULTIPLY_ON _LIGHT_LAYERS _MAIN_LIGHT_SHADOWS_CASCADE _REFLECTION_PROBE_ATLAS _REFLECTION_PROBE_BLENDING _REFLECTION_PROBE_BOX_PROJECTION _SCREEN_SPACE_OCCLUSION _SHADOWS_SOFT _SURFACE_TYPE_TRANSPARENT not found.