3839. [test] Use only posix-compatible shell in system tests. [RT #35625] (cherry picked from commit60988462e5) (cherry picked from commit812cf443bb) (cherry picked from commit5409faef5e)
3839. [test] Use only posix-compatible shell in system tests. [RT #35625] (cherry picked from commit60988462e5) (cherry picked from commit812cf443bb) (cherry picked from commit5409faef5e)