[wasm] Fix missing branch target table update (#83236)

The jiterpreter was failing to add unconditional branch targets to the branch target table, which could cause branches targeting them to fail and make the trace bail out.

src/mono/wasm/runtime/jiterpreter-trace-generator.ts

@@ -2396,6 +2396,7 @@ function emit_branch (
                 // Simple branches are enabled and this is a forward branch. We
                 //  don't need to wrap things in a block here, we can just exit
                 //  the current branch block after updating eip
+                builder.branchTargets.add(destination);
                 builder.ip_const(destination);
                 builder.local("eip", WasmOpcode.set_local);
                 builder.appendU8(WasmOpcode.br);