[Cloud Security] fix accounts evaluation count issue (#173035)

## Summary

Summarize your PR. If it involves visual changes include a screenshot or
gif.

The Account Evaluation counter only counts the type of benchmark. For
instance, the `cis_azure` benchmark counter shows 1 because we count the
benchmark type which is always 1. We need to display the
`benchmark.meta.assetCount` will accurately display the number of
accounts per benchmark ID.
<img width="1205" alt="Screenshot 2023-12-11 at 6 09 41 AM"
src="https://github.com/elastic/kibana/assets/17135495/978fcca3-fbc8-44d0-b6cf-8f3e07a42505">

(cherry picked from commit 305b6da)

x-pack/plugins/cloud_security_posture/public/components/accounts_evaluated_widget.tsx

@@ -52,8 +52,8 @@ export const AccountsEvaluatedWidget = ({
 }) => {
   const { euiTheme } = useEuiTheme();
 
-  const filterBenchmarksById = (benchmarkId: string) => {
-    return benchmarkAssets?.filter((obj) => obj?.meta.benchmarkId === benchmarkId) || [];
+  const getBenchmarkById = (benchmarkId: string) => {
+    return benchmarkAssets?.find((obj) => obj?.meta.benchmarkId === benchmarkId);
   };
 
   const navToFindings = useNavigateFindings();
@@ -67,7 +67,7 @@ export const AccountsEvaluatedWidget = ({
   };
 
   const benchmarkElements = benchmarks.map((benchmark) => {
-    const cloudAssetAmount = filterBenchmarksById(benchmark.type).length;
+    const cloudAssetAmount = getBenchmarkById(benchmark.type)?.meta?.assetCount || 0;
 
     return (
       cloudAssetAmount > 0 && (