```
internal/sanitizers.h:57:26: error: ISO C does not allow extra ‘;’ outside of a function [-Wpedantic]
   57 |     COMPILER_WARNING_PUSH; \
      |                          ^
```

and so many.

Remove semicolons following pragma, and repeat the given declaration
at the end to consume a semicolon following the macro call.  As many
`NO_SANITIZE` calls including bigdecimal that is a gem have a trailing
semicolon, it was not able to move the semicolon inside `NO_SANITIZE`.