[Cloud Security] Update Vuln Mgmt Asset page (#155676)

## Summary
https://github.com/elastic/security-team/issues/6393
This PR is to address the issue where the asset page for Vuln mgmt page
is showing options for pages that hasn't been developed yet. The fix
includes
1. Removing Dashboard and Rule options on Asset tab if integration is
Vuln Mgmt
2. Updating the link for Findings to redirect users to
Findings/Vulnerability instead of Findings/Configuration if integration
is Vuln Mgmt
3. Update parent integration asset to include both Dropdown from Cloud
Posture and Vulnerability Management

**Definition of done**

- [x] Show all relevant pages split by Cloud Posture and Vulnerability
Management in the parent integration assets
- [x] Show only vulnerabilitiy management findings link when viewing
Vulnerability Management->Assets
- [x] Make sure KSPM and CSPM shows the same links available today

<img width="1667" alt="Screen Shot 2023-04-24 at 5 24 10 PM"
src="https://user-images.githubusercontent.com/8703149/234144304-782cdd29-8d0a-42eb-a210-56423868b0f7.png">
<img width="1654" alt="Screen Shot 2023-04-25 at 11 32 24 AM"
src="https://user-images.githubusercontent.com/8703149/234370092-383b29b2-0c29-4f7e-9fcd-29c53edd4f10.png">

x-pack/plugins/cloud_security_posture/public/components/fleet_extensions/custom_assets_extension.tsx

@@ -8,6 +8,10 @@
 import React from 'react';
 import { type CustomAssetsAccordionProps, CustomAssetsAccordion } from '@kbn/fleet-plugin/public';
 import { i18n } from '@kbn/i18n';
+import { useParams } from 'react-router-dom';
+import { EuiSpacer } from '@elastic/eui';
+import { CloudSecurityPolicyTemplate } from '../../../common/types';
+import { VULN_MGMT_POLICY_TEMPLATE } from '../../../common/constants';
 import { useKibana } from '../../common/hooks/use_kibana';
 import { benchmarksNavigation, cloudPosturePages } from '../../common/navigation/constants';
 
@@ -15,6 +19,21 @@ const SECURITY_APP_NAME = 'securitySolutionUI';
 
 export const CspCustomAssetsExtension = () => {
   const { application } = useKibana().services;
+  const integration = useParams<{ integration: CloudSecurityPolicyTemplate | undefined }>()
+    .integration;
+
+  const viewsCNVM: CustomAssetsAccordionProps['views'] = [
+    {
+      name: cloudPosturePages.findings.name,
+      url: application.getUrlForApp(SECURITY_APP_NAME, {
+        path: cloudPosturePages.findings.path + '/vulnerabilities',
+      }),
+      description: i18n.translate(
+        'xpack.csp.createPackagePolicy.customAssetsTab.vulnerabilityFindingsViewLabel',
+        { defaultMessage: 'View Vulnerability Findings ' }
+      ),
+    },
+  ];
 
   const views: CustomAssetsAccordionProps['views'] = [
     {
@@ -27,7 +46,9 @@ export const CspCustomAssetsExtension = () => {
     },
     {
       name: cloudPosturePages.findings.name,
-      url: application.getUrlForApp(SECURITY_APP_NAME, { path: cloudPosturePages.findings.path }),
+      url: application.getUrlForApp(SECURITY_APP_NAME, {
+        path: cloudPosturePages.findings.path,
+      }),
       description: i18n.translate(
         'xpack.csp.createPackagePolicy.customAssetsTab.findingsViewLabel',
         { defaultMessage: 'View CSP Findings ' }
@@ -42,6 +63,34 @@ export const CspCustomAssetsExtension = () => {
     },
   ];
 
+  if (!integration) {
+    return (
+      <>
+        <CustomAssetsAccordion
+          views={views}
+          initialIsOpen
+          title={i18n.translate(
+            'xpack.csp.createPackagePolicy.customAssetsTab.cloudPostureTitleLabel',
+            { defaultMessage: 'Cloud Posture ' }
+          )}
+        />
+        <EuiSpacer size="m" />
+        <CustomAssetsAccordion
+          views={viewsCNVM}
+          initialIsOpen
+          title={i18n.translate(
+            'xpack.csp.createPackagePolicy.customAssetsTab.cloudNativeVulnerabilityManagementTitleLabel',
+            { defaultMessage: 'Cloud Native Vulnerability Management ' }
+          )}
+        />
+      </>
+    );
+  }
+
+  if (integration === VULN_MGMT_POLICY_TEMPLATE) {
+    return <CustomAssetsAccordion views={viewsCNVM} initialIsOpen />;
+  }
+
   return <CustomAssetsAccordion views={views} initialIsOpen />;
 };
 // eslint-disable-next-line import/no-default-export

x-pack/plugins/fleet/public/components/custom_assets_accordion.tsx

@@ -31,11 +31,13 @@ export interface CustomAssetsAccordionProps {
     description: string;
   }>;
   initialIsOpen?: boolean;
+  title?: string;
 }
 
 export const CustomAssetsAccordion: FunctionComponent<CustomAssetsAccordionProps> = ({
   views,
   initialIsOpen = false,
+  title,
 }) => {
   const { application } = useStartServices();
 
@@ -46,7 +48,7 @@ export const CustomAssetsAccordion: FunctionComponent<CustomAssetsAccordionProps
         <EuiFlexGroup justifyContent="center" alignItems="center" gutterSize="s" responsive={false}>
           <EuiFlexItem grow={false}>
             <EuiText size="m">
-              <h3>{AssetTitleMap.view}</h3>
+              <h3>{title ?? AssetTitleMap.view}</h3>
             </EuiText>
           </EuiFlexItem>
           <EuiFlexItem grow={false}>