Training: Monitoring used - directly and indirectly - in WM

[amaltaro]

Impact of the new feature
WM in general

Is your feature request related to a problem? Please describe.
Sharing knowledge and empowering WM/Ops to understand and debug the system. Sub-task of #11837

Describe the solution you'd like
Topic of this ticket is: Monitoring used - directly and indirectly - in WM

For the expected solution, please refer to the meta-issue for further details (in short: documentation + recorded presentation).

Describe alternatives you've considered
None

Additional context
None

[khurtado]

@d-ylee and I had our first meeting to coordinate on the training material for this issue, hence marking this as "In progress".

[amaltaro]

@d-ylee @khurtado now that the training has been provided and training material updated in https://cms-wmcore.docs.cern.ch/training/monitoring/, shall we close this out?