Improve texture caching by allowing weak refs and more formats (#4447)

* Destroy GPU textures when the last reference drops

* Request pooled textures synchronously

* Pool cached textures by format

* Add the owned GPU buffer type

* Route the remaining GPU allocations through the executor

* Add weak texture parking to the texture cache

* Raise the texture cache budget to 1GB for native and 512MB for wasm

node-graph/libraries/wgpu-executor/src/buffer.rs

@@ -0,0 +1,34 @@
+use std::ops::Deref;
+use std::sync::Arc;
+
+#[derive(Clone, Debug)]
+pub struct Buffer(Arc<BufferInner>);
+
+#[derive(Debug)]
+struct BufferInner(wgpu::Buffer);
+
+impl Drop for BufferInner {
+	fn drop(&mut self) {
+		self.0.destroy();
+	}
+}
+
+impl Deref for Buffer {
+	type Target = wgpu::Buffer;
+
+	fn deref(&self) -> &Self::Target {
+		&self.0.0
+	}
+}
+
+impl AsRef<wgpu::Buffer> for Buffer {
+	fn as_ref(&self) -> &wgpu::Buffer {
+		&self.0.0
+	}
+}
+
+impl From<wgpu::Buffer> for Buffer {
+	fn from(buffer: wgpu::Buffer) -> Self {
+		Self(Arc::new(BufferInner(buffer)))
+	}
+}