Github actions clang version mismatch

[azanegin]

-- The C compiler identification is Clang 14.0.0
-- The CXX compiler identification is Clang 14.0.0
8<============cut===============
-- Found LLVM 15.0.[7](https://github.com/ligurio/luzer/actions/runs/7240171193/job/19794688179#step:8:8)
-- Found libclang_rt /usr/lib/llvm-15/lib/clang/15.0.7/lib/linux/libclang_rt.fuzzer_no_main-x[8](https://github.com/ligurio/luzer/actions/runs/7240171193/job/19794688179#step:8:9)6_64.a
-- Configuring done (4.5s)
-- Generating done (0.0s)
-- Build files have been written to: /home/runner/work/luzer/luzer/build

I'm not sure about that, but possibly Testing action uses clang-14 to link with libclang_rt-15.

[ligurio]

Right, there is a problem with searching correct version of libclang_rt, I'll address it in #9.