Override key generation for all tests

[tegefaulkes]

Specification

With the changes from #404 it is now possible to skip key generation all together. So far this optimisation has been applied to the bin tests but now we need to apply it to the rest of the jest tests.

This can be done by taking every instance of createPolykeyAgent and adding the following keysConfig parameter to it. Currently globalRootKeyPems contains 10 pre-generated private key Pems.

keysConfig: {
        privateKeyPemOverride: globalRootKeyPems[0],
      },

If there are any instances of a polykey agent start bin command being used then you can use the following PK_ROOT_KEY: globalRootKeyPems[0] Env variable.

Any Polykey agents that are created inside a beforeAll should now be done inside the beforeEach. This will give better test isolation.

Additional context

• Related Switch from using the global agent to using global keypairs for tests #404

Tasks

• 1. convert every instance of createPolykeyAgent to use the above config to skip key generation.
• 2. convert any polykey agents that are created inside a beforeAll to use beforeEach.