loader: Remove updating ctx->dynamic_offset in emit_br_info (#3259)

Should not update `ctx->dynamic_offset` in emit_br_info, since the `Part e` only
sets the dst offsets, the operand stack should not be changed, e.g., the stack
operands are to be used by the opcodes followed by `br_if` opcode.

Reported in https://github.com/bytecodealliance/wasm-micro-runtime/issues/3210.

core/iwasm/interpreter/wasm_loader.c

@@ -8907,7 +8907,6 @@ wasm_loader_emit_br_info(WASMLoaderContext *ctx, BranchBlock *frame_csp,
         /* Part e */
         dynamic_offset =
             frame_csp->dynamic_offset + wasm_get_cell_num(types, arity);
-        ctx->dynamic_offset = dynamic_offset;
         for (i = (int32)arity - 1; i >= 0; i--) {
             cell = (uint8)wasm_value_type_cell_num(types[i]);
             dynamic_offset -= cell;

core/iwasm/interpreter/wasm_mini_loader.c

@@ -4698,7 +4698,6 @@ wasm_loader_emit_br_info(WASMLoaderContext *ctx, BranchBlock *frame_csp,
         /* Part e */
         dynamic_offset =
             frame_csp->dynamic_offset + wasm_get_cell_num(types, arity);
-        ctx->dynamic_offset = dynamic_offset;
         for (i = (int32)arity - 1; i >= 0; i--) {
             cell = (uint8)wasm_value_type_cell_num(types[i]);
             dynamic_offset -= cell;