SearchJobStateService extended to allow reset of latest search job

[luk-kaminski]

Description

SearchJobStateService extended to allow reset of latest search job.
/nocl (new/unreleased functionality)

Motivation and Context

FE needs a way to reset latest search jobs

How Has This Been Tested?

With new unit test and manually.

Types of changes

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

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.