Now that SDK does not depend on opentelemetry-instrumentation
anymore and opentelemetry-instrumentation has actual build time
dependencies on the contrib repo, it makes maintanence a lot
easier if we move opentelemetry-instrumentation to contrib repo.
opentelemetry-distro depends on opentelemetry-instrumentation
and is being moved as well. Neither of the two packages are
really part of "core" Otel python anyway.
