Migrate tracing libs (#641)

* migrated charm tracing libs

* removed tempo libs

* pin ops

* pin ops to 2.15 - there's more changes that aren't reflected in tests yet

* Add pydantic to charm-binary-python-packages in tester

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Co-authored-by: Luca Bello <luca.bello@canonical.com>
Co-authored-by: Mateusz Kulewicz <mateusz.kulewicz@canonical.com>