refactor: Refactor GitHubIssueSearch and remove redundant files

[MartinWitt]

No description provided.

[gitstream-cm]

All PRs must be titled according to our semantic naming policy: <type>(<scope>): <short summary>

Type must be one of the following:

• build
• ci
• chore
• docs
• feat
• fix
• refactor

[gitstream-cm]

This PR is 41.208791208791204% new code.

[github-actions]

Qodana Community for JVM

1 new problem were found

Inspection name	Severity	Problems
Field may be 'final'	🔶 Warning	1

💡 Qodana analysis was run in the pull request mode: only the changed files were checked

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