Add ability to check for prior values in cliflagv3.ProviderWithConfig() just like posflag - #403

This PR contains the following updates:

| Package | Type | Update | Change | OpenSSF |
|---|---|---|---|---|
| [github.com/knadh/koanf/v2](https://github.com/knadh/koanf) | require | patch | `v2.3.3` → `v2.3.4` | [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/knadh/koanf/badge)](https://securityscorecards.dev/viewer/?uri=github.com/knadh/koanf) |

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### Release Notes

<details>
<summary>knadh/koanf (github.com/knadh/koanf/v2)</summary>

### [`v2.3.4`](https://github.com/knadh/koanf/releases/tag/v2.3.4)

[Compare Source](knadh/koanf@v2.3.3...v2.3.4)

#### What's Changed

- Bump github.com/nats-io/nats-server/v2 from 2.10.27 to 2.11.12 in /providers/nats by [@&#8203;dependabot](https://github.com/dependabot)\[bot] in [#&#8203;400](knadh/koanf#400)
- Bump filippo.io/edwards25519 from 1.1.0 to 1.1.1 in /providers/kiln by [@&#8203;dependabot](https://github.com/dependabot)\[bot] in [#&#8203;399](knadh/koanf#399)
- Bump google.golang.org/grpc from 1.71.1 to 1.79.3 in /providers/etcd by [@&#8203;dependabot](https://github.com/dependabot)\[bot] in [#&#8203;405](knadh/koanf#405)
- fix: hold RLock during copy in Get to prevent concurrent map access by [@&#8203;alexchenai](https://github.com/alexchenai) in [#&#8203;406](knadh/koanf#406)
- Add ability to check for prior values in `cliflagv3.ProviderWithConfig()` just like `posflag` by [@&#8203;knadh](https://github.com/knadh) in [#&#8203;403](knadh/koanf#403)

#### New Contributors

- [@&#8203;alexchenai](https://github.com/alexchenai) made their first contribution in [#&#8203;406](knadh/koanf#406)

**Full Changelog**: <knadh/koanf@v2.3.3...v2.3.4>

</details>

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