Added loop hint to PCF tent sampling functions to make compilation times a bit more sane.

Assets/ScriptableRenderPipeline/ShaderLibrary/Shadow/ShadowSampling.hlsl

 	// add the depth bias
 	coord.z += depthBias;
 
-	half shadow = 0;
+	float shadow = 0.0;
-	for (int i = 0; i < 4; i++)
+	[loop] for (int i = 0; i < 4; i++)
 	{
 		shadow += fetchesWeights[i] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[i].xy,  coord.z ), slice ).x;
 	}
 	// add the depth bias
 	coord.z += depthBias;
 
-	half shadow = 0;
+	float shadow = 0.0;
 	float fetchesWeights[4];
 	float2 fetchesUV[4];
 
 	// add the depth bias
 	coord.z += depthBias;
 
-	half shadow = 0;
+	float shadow = 0.0;
-	for (int i = 0; i < 9; i++)
+	[loop] for (int i = 0; i < 9; i++)
 	{
 		shadow += fetchesWeights[i] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[i].xy,  coord.z ), slice ).x;
 	}
 	// add the depth bias
 	coord.z += depthBias;
 
-	half shadow = 0;
+	float shadow = 0.0;
 	float fetchesWeights[9];
 	float2 fetchesUV[9];
 
 	// add the depth bias
 	coord.z += depthBias;
 
-	half shadow = 0;
+	float shadow = 0.0;
-	for (int i = 0; i < 16; i++)
+	[loop] for (int i = 0; i < 16; i++)
+
 	return shadow;
 }
 
 	// add the depth bias
 	coord.z += depthBias;
 
-	half shadow = 0;
+	float shadow = 0.0;
 	float fetchesWeights[16];
 	float2 fetchesUV[16];
 
 		shadow += fetchesWeights[i] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[i].xy,  coord.z ), slice ).x;
 	}
+
 	return shadow;
 }