refactor: make Analyzer accept the diagnostics configuration.

[peterhuene]

This commit refactors the new and new_with_validator methods of Analyzer to directly accept the DiagnosticsConfig rather than an iterator of rules which it immediately uses to create a DiagnosticsConfig internally.

By having the DiagnosticsConfig (which is Copy) passed in directly, we don't have to borrow a rule exception list that might also be used as part of the validator closure passed to new_with_validator, sparing us a clone.

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[a-frantz]

Missing a few CHANGELOG entries, but otherwise LGTM

[peterhuene]

Oh I don't bother with updating CHANGELOG for cascading changes from an upstream API change, just the CHANGELOG of the crate with the change itself.

[a-frantz]

O ok. That makes sense to me now that you say it! Assuming gauntlet on windows turns green, this gets my approval then