CI: Select node version to run CI against automatically

.github/actions/prepare/action.yml

@@ -6,7 +6,7 @@ inputs:
   node-version:
     description: 'The version of Node.js to use'
     required: false
-    default: '22'
+    default: 'current'
 
 runs:
   using: composite

.github/workflows/integration-workflow.yml

@@ -209,12 +209,28 @@ jobs:
         name: vscode-zipfs
         path: ./packages/vscode-zipfs/vscode-zipfs-*.vsix
 
+  node-versions:
+    name: 'Acceptance test node versions'
+    outputs:
+      versions: ${{ steps.versions.outputs.versions }}
+    runs-on: ubuntu-latest
+    steps:
+    - id: versions
+      shell: bash
+      run: >
+        echo -n 'versions='
+        >> $GITHUB_OUTPUT
+
+        curl https://nodejs.org/dist/index.json |
+        jq -c '[.[0:1] + map(select(.lts)) | .[].version | capture("^v(?<major>\\d+)") | .major | tonumber] | unique | map(select(. >= 18))'
+        >> $GITHUB_OUTPUT
+
   acceptance:
     strategy:
       fail-fast: false
       matrix:
         # We run the ubuntu tests on multiple Node versions with 2 shards since they're the fastest.
-        node: [18, 19, 20, 21, 22]
+        node: ${{ fromJson(needs.node-versions.outputs.versions) }}
         platform: [[ubuntu, 22.04]]
         shard: ['1/2', '2/2']
         include:
@@ -239,7 +255,7 @@ jobs:
 
     name: '${{matrix.platform[0]}}-latest w/ Node.js ${{matrix.node}}.x (${{matrix.shard}})'
     runs-on: ${{matrix.platform[0]}}-${{matrix.platform[1]}}
-    needs: build
+    needs: [build, node-versions]
 
     # Permission required to produce a valid provenance statement during the tests
     # Only run inside the main repository; this may fail in master since it doesn't run in PRs from forks
@@ -249,10 +265,10 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
-    - name: 'Use Node.js ${{matrix.node}}.x'
+    - name: 'Use Node.js ${{matrix.node}}'
       uses: actions/setup-node@v4
       with:
-        node-version: ${{matrix.node}}.x
+        node-version: ${{matrix.node}}
 
     - uses: actions/download-artifact@v4
       with: