[ir] Always inline `handle` address space.

Items in the `handle` address space can always be inlined. This fixes an
issue where in GLSL these can not be copied.

Change-Id: Idc8dfe5c8f88ebd90239337b4ad8c6d2c455edc5
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/207355
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
diff --git a/test/tint/builtins/gen/literal/textureStore/73a735.wgsl.expected.ir.dxc.hlsl b/test/tint/builtins/gen/literal/textureStore/73a735.wgsl.expected.ir.dxc.hlsl
index 80e98d8..49caab7 100644
--- a/test/tint/builtins/gen/literal/textureStore/73a735.wgsl.expected.ir.dxc.hlsl
+++ b/test/tint/builtins/gen/literal/textureStore/73a735.wgsl.expected.ir.dxc.hlsl
@@ -1,8 +1,7 @@
 
 RWTexture2DArray<int4> arg_0 : register(u0, space1);
 void textureStore_73a735() {
-  RWTexture2DArray<int4> v = arg_0;
-  v[uint3((1u).xx, uint(int(1)))] = (int(1)).xxxx;
+  arg_0[uint3((1u).xx, uint(int(1)))] = (int(1)).xxxx;
 }
 
 void fragment_main() {