Fixed missing support of manual UtSettings update

[Damtev]

Description

We have a toString implementation for UtSettings that uses default settings values and update from property file, but does not consider manual updates of UtSettings. This PR added this missed support of manual updates.

Type of Change

Please delete options that are not relevant.

• Minor bug fix (non-breaking small changes)

How Has This Been Tested?

Manual Scenario

Run a generation of parametrized tests, checked that org.utbot.framework.UtSettings#getSubstituteStaticsWithSymbolicVariable became to false in toString.

Checklist (remove irrelevant options):

• 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