Sampling of neighbors in NormalIntegerHyperparameter

[Neonkraft]

This PR resolves #298

• fix: Fix crash while sampling neighbors in the unbounded case
• fix: Make sampling neighbors in the bounded case respect the bounds
• fix: Make sampling of neighbors respect the number parameter
• test: Add tests for the bug

[codecov[bot]]

Codecov Report

Base: 68.22% // Head: 68.22% // No change to project coverage :thumbsup:

Coverage data is based on head (94e7dcb) compared to base (9e50cd5). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #299 +/- ## ======================================= Coverage 68.22% 68.22% ======================================= Files 26 26 Lines 1800 1800 ======================================= Hits 1228 1228 Misses 572 572 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=automl). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=automl)

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