MNTOR-2781 - Use BillingPeriod component for UpsellDialog pricing section

[codemist]

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References:

Jira: MNTOR-2781 and MNTOR-2484

Description

We have a dedicated component for the pricing toggle <BillingPeriod> which is used on the landing page, which meets the accessibility requirements that the previous iteration for the pricing toggle on the UpsellDialog did not. I leveraged that component instead of the old TabsList.

Screenshot (if applicable)

Checklist (Definition of Done)

• Localization strings (if needed) have been added.
• Commits in this PR are minimal and have descriptive commit messages.
• I've added or updated the relevant sections in readme and/or code comments
• I've added a unit test to test for potential regressions of this bug.
• Product Owner accepted the User Story (demo of functionality completed) or waived the privilege.
• All acceptance criteria are met.
• Jira ticket has been updated (if needed) to match changes made during the development process.
• Jira ticket has been updated (if needed) with suggestions for QA when this PR is deployed to stage.

[Vinnl]

Heh, for some reason I expected this to have more deleted lines. But it works well!