chore(dynamic alerts): Update Badge (#86560)

- Update badge from `alpha` to `beta` on alerts creation and detail page

<img width="555" alt="Screenshot 2025-03-06 at 2 51 40 PM"
src="https://github.com/user-attachments/assets/50dc64d6-a693-4066-9e3c-a190ce13c975"
/>
<img width="1057" alt="Screenshot 2025-03-06 at 2 50 14 PM"
src="https://github.com/user-attachments/assets/78b5643a-c03b-4014-a4b4-7ef8dd51812c"
/>

Author: aayush-se

static/app/views/alerts/rules/metric/details/sidebar.tsx

@@ -114,10 +114,10 @@ function TriggerDescription({
             {thresholdText}
             {rule.detectionType === AlertRuleComparisonType.DYNAMIC ? (
               <FeatureBadge
-                type="alpha"
+                type="beta"
                 tooltipProps={{
                   title: t(
-                    'Anomaly detection is in alpha and may produce inaccurate results'
+                    'Anomaly detection is in beta and may produce unexpected results'
                   ),
                   isHoverable: true,
                 }}

static/app/views/alerts/rules/metric/thresholdTypeForm.tsx

@@ -101,9 +101,9 @@ function ThresholdTypeForm({
       <ComparisonContainer key="Dynamic">
         {t('Anomaly: whenever values are outside of expected bounds')}
         <FeatureBadge
-          type="alpha"
+          type="beta"
           tooltipProps={{
-            title: t('Anomaly detection is in alpha and may produce inaccurate results'),
+            title: t('Anomaly detection is in beta and may produce unexpected results'),
             isHoverable: true,
           }}
         />