[CAM-11898] Historic process instances contain modification date

Feature Description:

* given:
- I have created some process instance data, e.g. a bunch of process instances started, suspended, activated and completed
when:
- I request the historic instance data sorted by modification date
then:
- I get the historic process instances
- each entry contains the date of its last modification
such that:
- Optimize is able to import the historic process instance data in a way that can catch changes in the process instance state (e.g. a suspension of the process instance).

AT's:

the historic process instance table stores the last modification date
whenever there's a change of the process instance change, it's persisted to the database (e.g. suspension, activation)
the modification date feature works for batch operations as well
the historic process instance endpoint adds the modification date to the response
there is an index on the modification date that allows fast sorting and retrieval of the historic process instances
Backported to all maintained versions

camunda BPM