UML-3042 add other names (also known as) field

[MishNajam]

Purpose

Exposes the "Also known as" field (othernames) so it is accessible for use an LPA. PR in Sirius to update the API endpoint.

For UML-3042

Approach

I added it everywhere middlenames is set.

In order to be able to run make setup-all:

• Updated pact image to run on M1 machine
• Updated dockerfile to
  • upgrade pip before running pip install
  • mock-sirius Dockerfile upgraded from python 3.6 to python 3.8 in line with the Dockerfile in lambda-functions
• Updated requirements files to be consistent with pinned versions across mock-sirius and lambda-functions

Checklist

• I have performed a self-review of my own code
• I have added relevant logging with appropriate levels to my code
  • N/A
• I have updated documentation where relevant
  • N/A
• I have added tests to prove my work
• I have run the integration tests (results below)
  • Could not run