Move logger handlers to opentelemetry-instrumentation-logging (#4210)

* Move logging integrations into auto-instrumentation

* opentelemetry-instrumentation-logging: move the sdk logging handler here

And hook it up via entry point

* Add header and future annotations import

* Rename entry point group to opentelemetry_logging_integrations

* Consider setting up the LoggingHandler as a normal instrumentation

* Fix typo

* Add missing import

* Copy handler tests from core

* More work towards green tests

* Cleanup properly after loggingHandler tests

* Quite hard to expect a mock to setup the handler

* Call removehandler also on local loggers

No change in practice

* Fix wrong noop test

* Move to our own env var for controlling autoinstrumentation

* Copy handler benchmark from sdk

* Document the new environment variables

* Add changelog

* Please pylint

* Added warning about coexistence with sdk code

* Reword a bit

* Assert that the LoggingHandler has not been setup in uninstrumented test

* Add manual handling of auto instrumentation and code attributes logging

* Update instrumentation/opentelemetry-instrumentation-logging/src/opentelemetry/instrumentation/logging/constants.py

* Apply suggestions from code review

Co-authored-by: Pablo Collins <pablo.collins@gmail.com>

* Apply more Pablo feedback

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Co-authored-by: Pablo Collins <pablo.collins@gmail.com>