Support startColumn field in the SARIF report

[mmvpm]

Description

Add a new field startColumn to the SARIF report.

An empty space at the beginning of the line is not highlighted:

Fixes #452

Type of Change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Automated Testing

org.utbot.sarif.SarifReportTest

Manual Scenario

1. Run test generation in any way
2. Look at the created SARIF report
3. Make sure it contains physicalLocation.region.startColumn field
4. Check the highlighted region (examples in the issue Clarify the scope of error highlighting in the SARIF report #452)

Checklist:

• The change followed the style guidelines of the UTBot project
• Self-review of the code is passed
• The change contains enough commentaries, particularly in hard-to-understand areas
• New documentation is provided or existed one is altered
• No new warnings
• Tests that prove my change is effective
• All tests pass locally with my changes

Thanks