[backport v2.9.5] Improve Fleet Performance

[github-actions]

This is a backport issue for #12424, automatically created via GitHub Actions workflow initiated by @richard-cox

Original issue body:

Setup

• Rancher version: 2.9

Contributes to SURE-9104

Describe the bug

Improve or remove fleet git repo clusterResourceStatus and resourcesStatuses getters

• The performance of clusterResourceStatus and specifically resourcesStatuses is horrible
  • Compounded by being called a LOT given bundledeployment churn
• We need a short term fix before understanding final information requirements of fleet
  • Could involve fleet providing summary of states as requierd
  • Could involve making some very low bar fixes to functions
  • Could involve removing the need to show data

Remove dependnecy on bundledeployment resource type

• this can be HUGE, taking many seconds to fetch and then provide churn over websocket
• need to confirm where this data is used and either remove the need for it or receive from Fleet directly

Additional context
Reference chain

gitRepo clusterResourceStatus
--> shell/components/formatter/FleetSummaryGraph.vue component computed summary. find specific cluster --> status.resoureCounts
--> FLEET_SUMMARY header
--> Fleet Cluster List View (Resources Column)
--> shell/components/fleet/FleetRepos.vue cluster (in not cluster mode) list
--> Fleet Git Repo List (actual list)
--> Fleet cluster Group List View (Resources Column)
--> shell/components/formatter/FleetClusterSummaryGraph.vue wrapper
--> shell/components/fleet/FleetRepos.vue (in cluster mode)
--> Fleet Cluster Detail View (git repo list 'Resources' column)
--> shell/components/fleet/FleetRepos.vue (in cluster mode)
--> find current cluster --> cluster.status?.displayStatus
--> Fleet Cluster Detail View (git repo list)

gitRepo resourcesStatuses
--> gitRepo clusterResourceStatus
--> shell/components/fleet/FleetResources.vue
--> Fleet Git Repo Detail View (resources table)

trying to summarise ...

• Fleet Cluster List View (Resources Column)
• Fleet Git Repo List (State column)
• Fleet Git Repo List (Resources column)
• Fleet ClusterGroup List View (Resources Column)
• Fleet Cluster Detail View (top section, large pills)
• resourcesStatuses is only used specifically in the Fleet Git Repo Detail View (resources table)