[PR] LIT: add checking if maxIndividualTestTime is availabe on the platform

Summary:
This commit adds checking if maxIndividualTestTime is availabe on
the platform. If available - it sets per test timeout to 60sec and
declares lit-max-individual-test-time feature for further checking
by particular test cases.
Based on https://reviews.llvm.org/D64251 implementation.

Vasily Leonenko,
Advanced Software Technology Lab, Huawei

(cherry picked from FBD30821986)