Remove Arrow from Carousel CTA & add CSS changes for promotion.css

[varunmitra]

Fix #250, #251

Test URLs:

• Before: https://main--hubblehomes-com--aemsites.hlx.live/promotions/promotions-detail/hubble-homes-for-heroes

• After: https://issue-250--hubblehomes-com--aemsites.hlx.live/promotions/promotions-detail/hubble-homes-for-heroes

[aem-code-sync[bot]]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed. In case there are problems, just click a checkbox below to rerun the respective action.

• [ ] Re-run PSI checks
• [ ] Re-sync branch

Commits

* [809c01f](https://github.com/aemsites/hubblehomes-com/commit/809c01fbff8b7c2300f862363c0cef4ab853eb5c) :white_check_mark: (latest) * [313ac51](https://github.com/aemsites/hubblehomes-com/commit/313ac51864428acebc3bca8b9d7d952a0b19cc5a) :white_check_mark:

[aem-code-sync[bot]]

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