Tidy unused DesignableBanner code (#14141)

* capture animated header story

* move ThreeTierChoiceCards from epic to shared directory

* export under both names till can rename

* identify unused banner components as step towards removal

* identify unused banner component

* identify unused another banner component

* mark as unused, highlight potential keeper sections

* also notice this is not used anywhere - marked as unused

* flag more unused

* move interface to more uesful place before deleting otherwise unused file

* delete unused code

* move headline css override into component and use source typography equivalent

* embed separate margins into existing, remove style lint issues

* fix mobile headline size

* rename DesignableBannerCtasV2 to DesignableBannerCtas and fix import

* delete files for PaymentCards and useReminders as unused

* remove cssoverride for close button as unused

* remove extra headline bottom border to fix chromatic changes

* reduce top margin on headline if image exists to fix chromatic error

* reduce top margin on headline if image exists to fix chromatic error one more time

* rename DesignableBannerV2 to DesignableBanner across the board, duplicate import in ReaderRevenueBanner till fixed in SDC

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Co-authored-by: sookburt <“[email protected]”>

Author: sookburt

dotcom-rendering/src/components/StickyBottomBanner/ReaderRevenueBanner.tsx

@@ -312,7 +312,7 @@ export const ReaderRevenueBanner = ({
 			  import(`../marketing/banners/signInPrompt/SignInPromptBanner`)
 			: name === 'DesignableBannerV2'
 			? /* webpackChunkName: "designable-banner-v2" */
-			  import(`../marketing/banners/designableBanner/DesignableBannerV2`)
+			  import(`../marketing/banners/designableBanner/DesignableBanner`)
 			: /* webpackChunkName: "designable-banner" */
 			  import(`../marketing/banners/designableBanner/DesignableBanner`)
 		)