Snowflake-telemetry-python

* Upgrade OpenTelemetry Python dependencies to version 1.23.0
* Drop the dependency on package opentelemetry-exporter-otlp and all its transitive dependencies
* Add a dependency on package opentelemetry-exporter-otlp-proto-common, a lighter weight package that brings in fewer transitive dependencies
* Remove unnecessary upper bound on setuptools dependency

* The `telemetry.add_event` function now adds an event to the current span, if any. This was a no op stub function before.
* The `telemetry.add_span_attribute` function now adds an attribute to the current span, if any. This was a no op stub function before.
* Added support for Python 3.11
* Removed support for Python 3.7
* Added `snowflake.telemetry._internal` module that wraps opentelemetry modules for use internally by Snowflake

* Added support for Python 3.10

* Update README and docstring to indicate this package is a stub

* Initial release.