Resolve "Remove hardcoded silecs version and installation path from silecs.py"

Issue #75 (closed)

• Now, I use silecs version from localisation of silecs.py (so the silecs version is version which was passed in build_and_install.sh)

Example:

• When I run directly silecs.py without installation by build_and_install.sh the silecs version is set to default 2.3.0. It makes unittests easier to run.

Example:

I added querying if validate or generate when silecs version mismatch, and removeddynamic imports during migration.