[GPU][DT] Failed to compile toy_llama.mlir when const-eval is off

To repro: `iree-compile --iree-hal-target-device=hip --iree-hip-target=gfx942 --iree-hip-encoding-layout-resolver=data-tiling --iree-llvmgpu-test-combine-layout-transformation=true ~/toy_llama.mlir -o /tmp/z.vmfb --iree-opt-data-tiling=false --iree-dispatch-creation-data-tiling --iree-opt-level=O3`

You can find the toy_llama.mlir from https://github.com/iree-org/iree-test-suites/tree/main/sharktank_models/llama3.1/assets

Note that it compiles if the option is on (which is default).

You can reproduce the issue from Codegen: https://gist.github.com/hanhanW/84281926535080272c1d66bcbe098bfd

`iree-compile --compile-from=executable-sources --compile-to=executable-targets repro.mlir`. The failures are mostly about encoding materialization. Some creates invalid expand_shape ops, and some crash.