Unclear SARIF report file name

[mmvpm]

Description

After test generation using the IDEA plugin, we have several SARIF reports: for each class named <ClassName>-utbot.sarif and one large report for the whole project named <ProjectName>-utbot-merged.sarif. The point is that these names are unclear to the user, so we need to rename them.

Also we need to rename test\resources\sarif to test\resources\utbot-sarif-report because there is the directory test\resources\utbot-tests-report.