[clang] [analyzer] Prettify checker registration and unittest code (PR #147797)

[Balazs Benics via cfe-commits]

=?utf-8?q?Don=C3=A1t?= Nagy <donat.nagy at ericsson.com>,
=?utf-8?q?Don=C3=A1t?= Nagy <donat.nagy at ericsson.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/147797 at github.com>


https://github.com/steakhal requested changes to this pull request.

tiny nits. Indeed it would get simpler :)

https://github.com/llvm/llvm-project/pull/147797