fix: retry indexing the same block range on handler failure

[mpetrun5]

Restarts loop on the same block range if event handler returns an error.

Adds tests for listener logic (some redundant tests that are copied from another file were over it so it looks a bit weird in git)

Description

Related Issue Or Context

Closes: #352

How Has This Been Tested? Testing details.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation

Checklist:

• I have commented my code, particularly in hard-to-understand areas.
• I have ensured that all acceptance criteria (or expected behavior) from issue are met
• I have updated the documentation locally and in chainbridge-docs.
• I have added tests to cover my changes.
• I have ensured that all the checks are passing and green, I've signed the CLA bot

[github-actions]

Go Test coverage is 65.2 %\ ✨ ✨ ✨

[github-actions]

Go Test coverage is 65.2 %\ ✨ ✨ ✨

[github-actions]

Go Test coverage is 65.2 %\ ✨ ✨ ✨