Simplify syntax of data-fronts-test-uuid attribute assignment

Author: emma-imber

dotcom-rendering/src/components/Card/components/CardLink.tsx

@@ -57,9 +57,7 @@ const InternalLink = ({
 				shouldRaiseZIndexForAbTest ? abTestZIndexStyles : zIndexStyles,
 			]}
 			data-link-name={dataLinkName}
-			{...(headlineTestUuid != undefined && {
-				'data-fronts-test-uuid': headlineTestUuid,
-			})}
+			data-fronts-test-uuid={headlineTestUuid}
 			aria-label={headlineText}
 		/>
 	);
@@ -86,9 +84,7 @@ const ExternalLink = ({
 				shouldRaiseZIndexForAbTest ? abTestZIndexStyles : zIndexStyles,
 			]}
 			data-link-name={dataLinkName}
-			{...(headlineTestUuid != undefined && {
-				'data-fronts-test-uuid': headlineTestUuid,
-			})}
+			data-fronts-test-uuid={headlineTestUuid}
 			aria-label={headlineText + ' (opens in new tab)'}
 			target="_blank"
 			rel="noreferrer"

dotcom-rendering/src/components/SupportingContent.tsx

@@ -186,9 +186,7 @@ export const SupportingContent = ({
 								: verticalSublinkStyles,
 						]}
 						data-link-name={`sublinks | ${index + 1}`}
-						{...(subLink.headlineTestUuid != undefined && {
-							'data-fronts-test-uuid': subLink.headlineTestUuid,
-						})}
+						data-fronts-test-uuid={subLink.headlineTestUuid}
 					>
 						<FormatBoundary format={subLinkFormat}>
 							<ContainerOverrides