[ir][fuzz] Allow all WGSL features for --dump-wgsl

This allows the disassembler to generate WGSL for IR modules that use
extensions.

Change-Id: I2ea2261fe13994178814b90a9ca8c732ff2dac41
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/264514
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>

src/tint/cmd/fuzz/ir/dis/main.cc

diff --git a/src/tint/cmd/fuzz/ir/dis/main.cc b/src/tint/cmd/fuzz/ir/dis/main.cc
index 6489be4..b650522 100644
--- a/src/tint/cmd/fuzz/ir/dis/main.cc
+++ b/src/tint/cmd/fuzz/ir/dis/main.cc
@@ -273,6 +273,7 @@
     }
 
     tint::wgsl::writer::Options writer_options;
+    writer_options.allowed_features = tint::wgsl::AllowedFeatures::Everything();
     auto output = tint::wgsl::writer::WgslFromIR(module, writer_options);
     if (output != tint::Success) {
         std::cerr << "Failed to convert IR to WGSL Program: " << output.Failure() << "\n";