add option to record transferred artifacts

[smurf667]

Description:

This adds a TransferListener to the maven-extension so that artifact transfers can be recorded optionally.

Existing Issue(s):

See #1874

Testing:

DRAFT: No additional testing has been added yet.

Documentation:

DRAFT: No additional documentation has been added yet.

Outstanding items:

• See above: Additional tests and documentation still need to be done.
• Filtering of transfers below a certain threshold (size, duration) is not implemented yet; I tried to add a custom SpanExporter in OpenTelemetrySdkService - is see it getting called and filtering, but when I used the Jaeger UI setup (see blog) all spans were unexpectedly shown. The issue appears that the span must be created first (because the transfer events define start and end), but those not matching the thresholds should be ignored, and I don't know how to do that other than with the exporter.
• I am not deeply familiar with the OpenTelemetry API nor the Maven APIs, so some things may have to be rectified.
• There are some TODOs that should be addressed.

[linux-foundation-easycla]

• ✅login: smurf667 / (907cde8)

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