Adding stricter check on offline templates list

[Mzack9999]

Proposed changes

This PR implements a stricter check on list of templates used for offline matching, discarding raw ones

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)

Notes

Once #2192 is merged, the following test templates should be added to offline integration tests:

offline-allowed-paths => match

id: offline-allowed-paths

info:
  name: offline-allowed-paths
  author: pdteam
  severity: info
  description: offline-allowed-paths

requests:
  - path:
      - "{{BaseURL}}"
      - "{{BaseURL}}/"
      - "/"

    matchers:
      - type: status
        status:
          - 200

offline-raw.yaml => no match

id: offline-raw
info:
  name: Test Offline raw Template
  author: pdteam
  severity: info

requests:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}
        
    matchers:
      - type: status
        status:
          - 200

test.txt

HTTP/1.1 200 OK
Date: Tue, 21 Jun 2022 09:32:01 GMT
Content-Type: text/plain; charset=utf-8
Connection: close
x-frame-options: DENY
x-content-type-options: nosniff
x-xss-protection: 1;mode=block
cache-control: public, max-age=1801
CF-Cache-Status: HIT
Age: 1585
Last-Modified: Tue, 21 Jun 2022 09:05:36 GMT
Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
Server: cloudflare
CF-RAY: 71ebbc0a7ea83b8b-CDG

45
line1
this is a line containing FOO BAR
line3
0

[ehsandeep]

Since #2192 is now merged, @Mzack9999 could you please add the above templates as part of the test?