Fix TOB-EXECUTORCH-36: replace remapped_ids.at() with safe REMAP_ID macro

Introduce REMAP_ID macro that uses find() + ET_CHECK_OR_RETURN_ERROR
instead of std::unordered_map::at(), which throws std::out_of_range in
noexcept functions causing std::terminate(). Applied across all ~30
node-definition functions in XNNCompiler.

Authored-with: Claude

Author: Github Executorch