docs: concepts and building_applications migration (#3534)

# What does this PR do?

- Migrates the remaining documentation sections to the new documentation format

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## Test Plan

- Partial migration

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docs/source/distributions/eks/gp3-topology-aware.yaml

@@ -1,15 +0,0 @@
-# Set up default storage class on AWS EKS
-apiVersion: storage.k8s.io/v1
-kind: StorageClass
-metadata:
-  name: gp3-topology-aware
-  annotations:
-    storageclass.kubernetes.io/is-default-class: "true"
-parameters:
-  type: gp3
-  iops: "3000"
-  throughput: "125"
-provisioner: ebs.csi.aws.com
-reclaimPolicy: Delete
-volumeBindingMode: WaitForFirstConsumer
-allowVolumeExpansion: true