Fix undefined this in toMatchInterpolatedText, clearer error message

What does this MR do and why?

• Fixes TypeError: Cannot read property 'utils' of undefined error on assertion failure
• Improves error message to clearly indicate the expected and received values

Screenshots or screen recordings

Before

TypeError: Cannot read property 'utils' of undefined

      23 |         `
      24 |       \n\n
    > 25 |       Expected: ${this.utils.printExpected(clearReceived)}
         |                        ^
      26 |       To equal: ${this.utils.printReceived(clearMatch)}
      27 |       `;
      28 |

After

Expected to be: <expected string>
Received: <actual string>

Expected to not be: <expected string>
Received: <actual string>

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Find an assertion that uses toMatchInterpolatedText
2. Change the expected value
3. Run the test

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #351382 (closed)