[NFC][analyzer] Enable implicit destructor for cfg-lifetime tests

This enables `cfg-temporary-dtors`, `cfg-rich-constructors`, and
`cfg-implicit-dtors` (defaults for CSA) for CFGLifetime test,
making int consistent with `cfg-scopes` test.
Before the fixes implemented in https://reviews.llvm.org/D153273,
this flags were incompatible.

Reviewed By: xazax.hun

Differential Revision: https://reviews.llvm.org/D155694

Author: Tomasz Kamiński