The meter provider initialization that was located here has now been
moved to a common area in the docker cli. This upgrades our CLI version
and then uses this common code instead of our own version.
As a piece of additional functionality, the docker OTEL endpoint can now
be overwritten with `DOCKER_CLI_OTEL_EXPORTER_OTLP_ENDPOINT` for
testing.
This removes the OTLP exporter from the CLI that was previously locked
behind `BUILDX_EXPERIMENTAL`. I do plan for this to return, but as a
proper part of the `docker/cli` implementation rather than something
special with `buildx`.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
