BDE tools does not install files under the BdeBuildSystem directory that are necessary at run-time

[mattrm456]

Perhaps mistakenly, I operated under the assumption that BDE tools may be installed by running cmake --install. However, this installation does not contain any files under the BdeBuildSystem directory that seem required at run-time.

To Reproduce:

1. Run `cmake -B <path/to/build/dir> -S <path/to/bde/tools> --install-prefix
2. Run `cmake --install <path/to/build/dir>
3. Notice a bunch of the bbs_build is installed to <prefix> but not any files in the BdeBuildSystem directory
4. Set <prefix/libexec/bde-tools/bin> to the PATH
5. Run bbs_build configure
6. Error: Cannot find BdeBuildSystem cmake modules

I expect to be able to use the result of installing this repository. This error does not occur when I run bbs_build from the directory into which I clone the repository.

Environment:

• Darwin G7WH7WFVKV 21.6.0 Darwin Kernel Version 21.6.0