Use Tarantool version structure across the project

[DifferentialOrange]

PR #629 introduced Tarantool version as a structure (both in module and pytest) to solve the issue of migrating to new release policy (#619). Tarantool version as a string is stored in context

cartridge-cli/cli/context/context.go

Line 125 in ba2f832

TarantoolVersion string

and validated with its own regexp

cartridge-cli/cli/common/tarantool.go

Line 21 in 7edd6f9

tarantoolVersionRegexp = regexp.MustCompile(`\d+\.\d+\.\d+-\d+-\w+`)

We should explore the code, replace excessive regexps and parsings (if there are some) by replacing them with version as a structure.

Follows up #629 (comment)

[DifferentialOrange]

Blocked until #629 is merged