opentelemetry-instrumentation-grpc depends on the SDK

[aabmass]

opentelemetry-instrumentation-grpc takes a hard dependency on the opentelemetry-sdk package

opentelemetry-python-contrib/instrumentation/opentelemetry-instrumentation-grpc/pyproject.toml

Line 29 in 3291f38

"opentelemetry-sdk ~= 1.12",

What is the expected behavior?
Instrumentations should never depend directly on the SDK

What is the actual behavior?
There is a hard dep

Additional context
I haven't investigated why it's there. Hopefully it can be removed trivially.

[xrmx]

There's also systems-metrics:

instrumentation/opentelemetry-instrumentation-system-metrics/pyproject.toml:  "opentelemetry-sdk ~= 1.11",