Add a sampler pool cache and improve texture pool cache (#3487)

* Add a sampler pool cache and improve texture pool cache

* Increase disposal timestamp delta more to be on the safe side

* Nits

* Use abstract class for PoolCache, remove factory callback

Ryujinx.Graphics.Gpu/Image/SamplerPoolCache.cs

@@ -0,0 +1,30 @@
+namespace Ryujinx.Graphics.Gpu.Image
+{
+    /// <summary>
+    /// Sampler pool cache.
+    /// This can keep multiple sampler pools, and return the current one as needed.
+    /// It is useful for applications that uses multiple sampler pools.
+    /// </summary>
+    class SamplerPoolCache : PoolCache<SamplerPool>
+    {
+        /// <summary>
+        /// Constructs a new instance of the texture pool.
+        /// </summary>
+        /// <param name="context">GPU context that the texture pool belongs to</param>
+        public SamplerPoolCache(GpuContext context) : base(context)
+        {
+        }
+
+        /// <summary>
+        /// Creates a new instance of the sampler pool.
+        /// </summary>
+        /// <param name="context">GPU context that the sampler pool belongs to</param>
+        /// <param name="channel">GPU channel that the texture pool belongs to</param>
+        /// <param name="address">Address of the sampler pool in guest memory</param>
+        /// <param name="maximumId">Maximum sampler ID of the sampler pool (equal to maximum samplers minus one)</param>
+        protected override SamplerPool CreatePool(GpuContext context, GpuChannel channel, ulong address, int maximumId)
+        {
+            return new SamplerPool(context, channel.MemoryManager.Physical, address, maximumId);
+        }
+    }
+}