Libraries delivered: Reconcile Bazel and CMake build

[marcalff]

This is a remaining item identified during review of PR #1420

(1)

Document:

• the name of each library delivered
• the expected dependency graph (DAG)

This documentation is meant to be used by:

• users of opentelemetry-cpp,
• maintainers of opentelemetry-cpp.

A good place could be docs/library-distribution.md

(2)

Fix the Bazel build to comply with (1)

(3)

Fix the CMake build to comply with (1)

Libraries build with Bazel or CMake should be the same.

[yxue]

Do we consider use the tools like https://github.com/google/bazel-to-cmake? The CMakeLists.txt can be generated from the BUILD and WORKSPACE as mentioned.

[owent]

I think it's difficult to use bazel-to-cmake like tools. CMake support environment detection better and has a better compatibility then bazel.(e.g. We support gcc 4.8 and use a old version of gRPC and abseil-cpp with cmake, but we don't suport legacy compilers with bazel now).
Maybe we can consider If there is a tool than can convert cmake script to bazel script, or just write a script to check if is there any target name different between bazel and cmake?

[github-actions]

This issue was marked as stale due to lack of activity.