fix: properly pass `BedrockLLMClient` timeout setting to `BedrockRuntimeClient.HttpClient`

[TeddyCr]

Motivation and Context

Working with BedrockLLMClient, I noticed some timeout issues between Koog and bedrock (SocketTimeoutError). It appears, from my understanding and investigation, the timeout config set in the BedrockLLMClient was not propagated to the HttpClient of the BedrockRuntimeClient.

Breaking Changes

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Type of the changes

• [ ] New feature (non-breaking change which adds functionality)
• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation update
• [ ] Tests improvement
• [ ] Refactoring

Checklist

• [x] The pull request has a description of the proposed change
• [x] I read the Contributing Guidelines before opening the pull request
• [x] The pull request uses develop as the base branch
• [x] Tests for the changes have been added
• [ ] All new and existing tests passed

Additional steps for pull requests adding a new feature

• [ ] An issue describing the proposed change exists
• [ ] The pull request includes a link to the issue
• [ ] The change was discussed and approved in the issue
• [ ] Docs have been added / updated

[TeddyCr]

Thank you @TeddyCr I also added the callTimeout configuration and improved unit test a bit

Awesome. Thank you @kpavlov

[TeddyCr]

Does bedrock use only OkHttp?

@devcrocod just pushed the changes.