opentelemetry-instrumentation-grpc is not checking for the special suppress_instrumentation context key before creating spans. This causes a recursion loop and stack overflow if you use SimpleSpanProcessor and a gRPC based exporter (like OTLP or Cloud Monitoring).

Describe your environment
opentelemetry-instrumentation-grpc 0.20b0

Steps to reproduce
Using SimpleSpanProcessor and OTLP exporter

What is the expected behavior?
Spans should not be created while suppress_instrumentation is in context

What is the actual behavior?
Spans get created and it create noise or causes stack overflow