[liftoff] Enable more code comments in release builds

Most Liftoff code comments are generated by the {NextInstruction}
function. That code was inside an "#ifdef DEBUG" block so far, because
previously code comments were only enabled in debug builds anyway. Now
that we have the separate v8_code_comments gn arg, they can also be
enabled in release builds.
Hence remove the "#if DEBUG" such that code comments are also output in
release mode.

This should not introduce any compile time regressions since both macros
are no-ops in official builds.

R=ahaas@chromium.org

Change-Id: I0bdd11534620072ccf0ff959c7f7d658aa75717b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2985243
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75382}

src/wasm/baseline/liftoff-compiler.cc

@@ -1055,14 +1055,12 @@ class LiftoffCompiler {
     // {EmitDebuggingInfo} stays outlined.
     if (V8_UNLIKELY(for_debugging_)) EmitDebuggingInfo(decoder, opcode);
     TraceCacheState(decoder);
-#ifdef DEBUG
     SLOW_DCHECK(__ ValidateCacheState());
-    if (WasmOpcodes::IsPrefixOpcode(opcode)) {
-      opcode = decoder->read_prefixed_opcode<Decoder::kFullValidation>(
-          decoder->pc());
-    }
-    CODE_COMMENT(WasmOpcodes::OpcodeName(opcode));
-#endif
+    CODE_COMMENT(WasmOpcodes::OpcodeName(
+        WasmOpcodes::IsPrefixOpcode(opcode)
+            ? decoder->read_prefixed_opcode<Decoder::kFullValidation>(
+                  decoder->pc())
+            : opcode));
   }
 
   void EmitBreakpoint(FullDecoder* decoder) {