Dsl variable support for matchers

[parrasajad]

Proposed changes

• Add variable/payload support to dsl matcher
• remove dynamicValues field from request struct to avoid data race

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[Ice3man543]

@parrasajad we can also add a test for this functionality.

[parrasajad]

Example template:

id: dsl-matcher-variable

info:
  name: dsl-matcher-variable
  author: pd-team
  severity: info

requests: 
  - 
    path: 
      - "{{BaseURL}}"
    payloads: 
      VALUES: 
        - This
        - is
        - test
        - matcher
        - text
    matchers: 
      - 
        dsl: 
          - 'contains(body,"{{VALUES}}")'
        type: dsl