[libc++][test] Refactor tests for std::{copy, move, fill} algorithms (#120909)

This refactor includes the following changes:
- Refactor similar tests using `types::for_each` to remove redundant code;
- Explicitly include the missing header `type_algorithms.h` in some test files;
- Some tests scattered in different test functions with ad-hoc names
  (e.g., `test5()`, `test6()`) but belong to the same kind are now grouped
  into one function (`test_struct_array()`).

0 files changed, 0 insertions, 0 deletions