opentelemetry-instrumentation: don't fail if an instrumentor raises ImportError #2923
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Description
Treat instrumentor loading raising ImportError different than the other exceptions.
In scenarios using the kubernetes operator to do autoinstrumentation some instrumentors (usually requiring binary extensions) may fail to load because the injected autoinstrumentation code does not match the application environment regarding python version, libc, etc... In this case it's better to skip the single instrumentation rather than failing to load everything so treat differently ImportError than the rest of exceptions.
Type of change
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How Has This Been Tested?
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Does This PR Require a Core Repo Change?
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