Allow to change test framework / platform version for executor

[exu]

Describe the enhancement you'd like to see

As a test engineer I want to run my tests against given version of testing framework or platform where test is run

Example use cases:

• npm project based executors solves that
• maven / gradle often has fixed Java version (let's name it platform behind testing framework) - we would need to handle that issue as currently it limits usage a lot
• postman file based - are run against newman of fixed version

[vsukhin]

And might be keep it updated to latest version by default