Describe personas for E2E Workflow Scripts

[szh]

Desired Outcome

Update the quick start guide in the README here (https://github.com/cyberark/conjur-authn-k8s-client/tree/master/bin/test-workflow) to describe which personas are running which set of scripts according to the personas outlined here (https://github.com/cyberark/dap-wiki/tree/master/how-to-guides/kubernetes).

Personas:

• k8s cluster admin
• Conjur admin
• App developer / devops engineer

Implemented Changes

• Added personas to README sections describing scripts.
• Fixed links to policy files that were broken by Update policy loading to match dap-wiki #409

Connected Issue/Story

Resolves #323

CyberArk internal issue link: ONYX-12652

Changelog

• The CHANGELOG has been updated, or
• This PR does not include user-facing changes and doesn't require a
  CHANGELOG update

Test coverage

• This PR includes new unit and integration tests to go with the code
  changes, or
• The changes in this PR do not require tests

Documentation

• Docs (e.g. READMEs) were updated in this PR
• A follow-up issue to update official docs has been filed here: insert issue ID
• This PR does not require updating any documentation

Behavior

• This PR changes product behavior and has been reviewed by a PO, or
• These changes are part of a larger initiative that will be reviewed later, or
• No behavior was changed with this PR

Security

• Security architect has reviewed the changes in this PR,
• These changes are part of a larger initiative with a separate security review, or
• There are no security aspects to these changes

[john-odonnell]

LGTM 👍