Clang-tidy, fix bugprone-exception-escape.

Remove redundant call to `ofstream::close()` from `~PSStrokeRenderer`
and `~TextStrokeRenderer`. ofstream will be destructed automatically.

- For `~Depsgraph`, `std::function`'s constructor can throw.
- Passing throwing statements in the lambda will not be detected by
  clang-tidy.
Fix these issues by using lambda as function argument.

Reviewed By: sergey, sybren
Differential Revision: https://developer.blender.org/D9497

.clang-tidy

@@ -29,7 +29,6 @@ Checks:  >
   -bugprone-sizeof-expression,
   -bugprone-integer-division,
 
-  -bugprone-exception-escape,
   -bugprone-redundant-branch-condition,
 
   modernize-*,