[Backport 5.2] utils: chunked_vector: fill ctor: make exception safe #18680
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Currently, if the fill ctor throws an exception,
the destructor won't be called, as it object is not fully constructed yet.
Call the default ctor first (which doesn't throw)
to make sure the destructor will be called on exception.
Fixes #18635
(cherry picked from commit 64c51cf)
(cherry picked from commit 88b3173)
(cherry picked from commit 4bbb66f)
Refs #18636