[SUPPORT-481] Adds `bg-remove`

[vuryanh]

Description

Updating to add bg-remove to imgix-url-params

Checklist

• [ ] Read the contributing guidelines.
• [ ] Each commit follows the Conventional Commit spec format.
• [ ] Update the readme (if applicable).
• [ ] Update or add any necessary API documentation (if applicable)
• [ ] All existing unit tests are still passing (if applicable).

• [ ] Add some steps so we can test your bug fix or feature (if applicable).
• [ ] Add new passing unit tests to cover the code introduced by your PR (if applicable).
• [ ] Any breaking changes are specified on the commit on which they are introduced with BREAKING CHANGE in the body of the commit.
• [ ] If this is a big feature with breaking changes, consider opening an issue to discuss first. This is completely up to you, but please keep in mind that your PR might not be accepted.