[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 <[email protected]>
Reviewed-by: Ryan Harrison <[email protected]>
Commit-Queue: Ryan Harrison <[email protected]>

Author: jrprice

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

@@ -273,6 +273,7 @@ bool EmitWGSL(const Options& options, tint::core::ir::Module& module) {
     }
 
     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";