Add pipeline pause and build duration

[FlorianVeaux]

Superseding: #57 but keeping the commit history.
Fixed conflicts, improved dependencies management using the jenkins BOM

Original description:

What does this PR do?

Currently the build duration is the total time a job takes to build - including "waiting for approval". If we would use that metric to show off we would see some builds where a long build duration is shown but no one will understand that this is not only the time to build the code but also waiting steps. Therefore we want to have the possibility to also show the duration how long each job was paused.
This PR will introduce the pause duration and duration without pause duration as new metric.
I also added some log messages so that the durations are also visible in the jenkins log if the specified logger is FINE enabled.

Verification Process

I ran all tests and they are all fine
I checked the introduced log messages in my jenkins in order to verify that the timings are correct
I installed the plugin on my jenkins, ran a job and verified on datadog, that all data is there as expected

[florimondmanca]

Don't have full context to give a definitive confident review, but approach and code LGTM 👍

[sarah-witt]

Looks good!

[sarah-witt]

🎉