qcodes import takes a long time

Importing qcodes with `import qcodes` takes a long time (> 2 seconds on the system tested). The import time can be analysed with tools like https://github.com/asottile/importtime-waterfall

Several components could perhaps not be loaded by default, or with a lazy loader (e.g. https://scientific-python.org/specs/spec-0001/, but there are more tools)

An example is the import `from opencensus.ext.azure.log_exporter import AzureLogHandler` from `qcodes.logger.logger`. By default `qc.config.telemetry.enabled` is False, so the import is executed at startup, but not used.

(more examples can be found by analysing the output of importtime-waterfall)

Start by profiling `import qcodes` with importtime-waterfall, then inspect the `AzureLogHandler` import in `qcodes.logger.logger` and other costly imports identified by the profile. Done means reducing startup import time by deferring components that are not needed by default, while preserving behavior when those components are used.

Written by the indexing model from the issue text.