::variant documentation is not clear enough

[orion160]

Uses Abseil C++ Library for absl::variant as default nostd::variant if WITH_ABSEIL cmake option or --@io_opentelemetry_cpp//api:with_abseil=true (aka --//api:with_abseil=true) bazel option is enabled. License: Apache License 2.0

https://github.com/open-telemetry/opentelemetry-cpp/blob/main/docs/dependencies.md

[orion160]

Key points:

WITH_ABSEIL uses nostd::variant or absl::variant?

Are WITH_STL and WITH_ABSL exclusive?

[github-actions[bot]]

This issue is available for anyone to work on. Make sure to reference this issue in your pull request. :sparkles: Thank you for your contribution! :sparkles:

[github-actions[bot]]

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