feat(repository): introduce search for layers by layerName parameter

[ahennr]

Description

This PR introduces two new methods for querying layer by layerName parameter (first result and all results matching passed String). This is especially useful in interceptor where the layer id is not available.

Related issues or pull requests

Pull request type

• Bugfix
• Feature
• Dependency updates
• Tests
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe)

Do you introduce a breaking change?

• Yes
• No

Checklist

• I understand and agree that the changes in this PR will be licensed under the
  Apache Licence Version 2.0.
• I have followed the guidelines for contributing.
• The proposed change fits to the content of the code of conduct.
• I have added or updated tests and documentation, and the test suite passes (run mvn test locally).
• I have added a screenshot/screencast to illustrate the visual output of my update.

[github-actions]

🎉 This PR is included in version 21.1.0 🎉

The release is available on:

• v21.1.0
• GitHub release

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