+/**
+ * This function updates the size of the push constant buffer we need to emit.
+ * This is called in various parts of the driver to ensure that different
+ * pieces of push constant data get emitted as needed. However, it is important
+ * that we never shrink the size of the buffer. For example, a compute shader
+ * dispatch will always call this for the base group id, which has an
+ * offset in the push constant buffer that is smaller than the offset for
+ * storage image data. If the compute shader has storage images, we will call
+ * this again with a larger size during binding table emission. However,
+ * if we dispatch the compute shader again without dirtying our descriptors,
+ * we would still call this function with a smaller size for the base group
+ * id, and not for the images, which would incorrectly shrink the size of the
+ * push constant data we emit with that dispatch, making us drop the image data.
+ */