[8.16] [Fleet] Ignore missing policies when fetching agent data (elas…

…tic#199325) (elastic#199348)

# Backport

This will backport the following commits from `main` to `8.16`:
- [[Fleet] Ignore missing policies when fetching agent data
(elastic#199325)](elastic#199325)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Nicolas
Chaulet","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-11-07T16:29:37Z","message":"[Fleet]
Ignore missing policies when fetching agent data
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Ignore missing policies when fetching agent
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Ignore missing policies when fetching agent data
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Ignore missing policies when fetching agent data
(elastic#199325)","sha":"52d7eaf6d71775f7e25f5661175e2d4603164f00"}},{"branch":"8.16","label":"v8.16.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Nicolas Chaulet <[email protected]>

x-pack/plugins/fleet/public/applications/fleet/sections/agents/agent_list_page/hooks/use_fetch_agents_data.tsx

@@ -52,6 +52,7 @@ function useFullAgentPolicyFetcher() {
       if (policiesToFetchIds.length) {
         const bulkGetAgentPoliciesResponse = await sendBulkGetAgentPolicies(policiesToFetchIds, {
           full: authz.fleet.readAgentPolicies,
+          ignoreMissing: true,
         });
 
         if (bulkGetAgentPoliciesResponse.error) {