StepChain workflows do not create LogCollect task for the Production/Processing task

[amaltaro]

Impact of the bug
ReqMgr2

Describe the bug
After many years, I noticed that the StepChain spec does not create a LogCollect task for the first task of the spec (Production or Processing task). While it does create the relevant LogCollect jobs for each Merge task.

An example workflow is:
https://cmsweb-testbed.cern.ch/reqmgr2/fetch?rid=amaltaro_SC_EL8_June2024_Val_240702_213115_3037

and one can inspect the workload object to see the tasks created. Those tasks are also listed in WMStats job detail view (upper table)

How to reproduce it
Create a StepChain workflow with a single step.

Expected behavior
The StepChain spec:
https://github.com/dmwm/WMCore/blob/master/src/python/WMCore/WMSpec/StdSpecs/StepChain.py

needs to create a LogCollect job for the output logs from the Production/Processing task.

Additionally, unit tests need to be updated accordingly.

Additional context and error message
None