`cmake --install`incorrectly installs development binaries in production

When configuring and installing using cmake by:

```
$ mkdir build && cd build
$ cmake -DPCRE2_SUPPORT_JIT=ON ..
$ cmake --build .
$ cmake --install .
```

Will result in the `pcre2_jit_test` and `pcre2posix_test` (after 10.42) binaries getting installed alongside `pcre2grep` and the other production tools, unlike what is done by autotools