Feat: Option to remove back button:

[SullyK]

Description

• This feature allows you to remove the back button on a given page with
  the following:
  "disableBackLink": true on each page.

For example:

   {
      "path": "/email-confirmed",
      "title": "Thank you for verifying your email",
      "disableBackLink": true,
      "components": [
        {
          "name": "EmailConfirmed",
          "options": {},
          "type": "Para",
          "content": "You have successfully confirmed your email address...."
          "schema": {}
        }
      ]
    },

Type of change

• [✓] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Tested locally on my own form in Google Chrome with sample forms with the feature enabled/disabled.
• Axe Devtools for accessibility. The two issues are unrelated.
  

Checklist:

• [✓] I have performed a self-review of my own code
• [✓] I have commented my code, particularly in hard-to-understand areas

[jenbutongit]

Please could you add cypress tests to this