Intent of truncation_respects_multi-byte_UTF-8_boundary

All 1 exact test in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 1 test
- server/ 1 test
  - common/ 1 test
    
    rpc/ 1 test
    
    interceptor/ 1 test
    
    TestServiceErrorInterceptorTruncation/ 1 test
    
    go.temporal.io/server/common/rpc/interceptor/TestServiceErrorInterceptorTruncation/truncation_respects_multi-byte_UTF-8_boundary Introduced here