Add specimen procedures from SLIMS Histology workflow

[dyf]

The procedures endpoint needs to integrate specimen procedures from the SLIMS Histology workflow.

Acceptance criteria

• an API exists for fetching metadata from the SLIMS Histology workflow called slims_histology.
• the procedures API integrates this information, mostly as specimen_procedures.

[mekhlakapoor]

We should probably break this issue up:
(1) Get SLIMS response in aind-slims-api.
(2) Add endpoint 'specimen_procedures' that maps slims response to specimen procedures in aind-metadata-service
(3) Integrate this information in the procedures endpoint

NOTE: Let's first figure out how this data is stored in SLIMS, and map out whether we'll need an operation class with multiple API calls

[mekhlakapoor]

This ticket took longer than expected:

• Paused on this for a few days to work on a scientist request
• In hindsight, merging it into the procedures response could've been handled in another ticket. I spent time trying to refactor the integrate_injection_materials and integrate_protocols steps to handle a response with specimen procedures, but it go overcomplicated and for now it makes sense to just merge specimen procedures after subject procedures are complete