Strip compatibility-page anchors and rework PlatformMatrix schema

- Replace compatibility.mdx#<anchor> links across 70 install-page references
  with anchor-less compatibility.mdx links. Component now renders a single
  matrix instead of per-platform headings, so the old anchors no longer exist.
- Redesign platformMatrixData.js around a unified entry shape:
  - alignedWith makes AKS/EKS/GKE/Charmed inherit kubeadm's k8s ranges, so
    bumping kubeadm bumps all four.
  - Each cell holds 0+ SupportEntry items, letting MKE on CE 3.22 stack
    MKE 3.9 and MKE 3.8 in one cell.
  - installPath + cni fields prepare the data file to drive
    platform-specific snippets on the per-platform install pages.
- PlatformMatrix component renders the latest VISIBLE_COLUMN_COUNT (3) CE
  versions, follows alignedWith, stacks multi-entry cells, and links the
  row label to the install page using a docs-version-relative path.
- Bring data current with upstream main: add MKE 3.9 entries for CE 3.23
  and CE 3.22 (3.22 keeps its dual MKE 3.9/3.8 row).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ctauchen

calico-enterprise/_includes/components/InstallOpenshiftBeforeYouBegin.js

@@ -20,7 +20,7 @@ export default function InstallOpenshiftBeforeYouBegin(props) {
       <ul>
         <li>
           <p>
-            A <Link href={`${baseUrl}/getting-started/compatibility#openshift`}>compatible OpenShift cluster</Link>
+            A <Link href={`${baseUrl}/getting-started/compatibility`}>compatible OpenShift cluster</Link>
           </p>
           <p>
             Your environment meets the {prodname}{' '}