YQL-20095: Enable modernize-use-override

The check `modernize-use-override` is useful as it:

1. Removes redundant `override` when it is used with a `final`.

2. Removes redundant `virtual` or replace it with a `override`.
   So it is more clean for a reader, that overriding happens.

It is enabled not out of order, as it is just an alias to
`cppcoreguidelines-explicit-virtual-functions`.

I also decided to switch a strategy of enabling checks. Now
I will enable only a single rule with a single PR and prefer
rules with a non-breaking autofix.

In the new year with new linter checks! 🎄
commit_hash:e6e233baa90b31e5f65e11837546690c47f71ab5

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