Piotr Sarna 768b5f3f29 utils: mark loading_cache::shrink as noexcept ...

Current code already assumes (correctly), that shrink() does not
throw, otherwise we risk leaking memory allocated in get_ptr():

```
 ts_value_lru_entry* new_lru_entry = Alloc().template allocate_object<ts_value_lru_entry>();

 // Remove the least recently used items if map is too big.
 shrink();
```

Let's be explicit and mark shrink() and a few helper methods
that it uses as noexcept. Ultimately they are all noexcept anyway,
because polymorphic allocator's deallocation routines don't throw,
and neither do boost intrusive list iterators.

Closes #10565

2022-05-13 18:28:58 +03:00

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