chore: update node.js to v26 (#38285)

- bump ci, flake and `@types/node` to node 26
- regenerate flake.lock which is needed for that package
- refactor workflow to use shared composite action

.github/workflows/pull-labeler.yml

@@ -35,7 +35,7 @@ jobs:
           ref: ${{ github.event.pull_request.base.sha }}
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
-          node-version: 24
+          node-version: 26
       # Labels are only synced after the title lints, so an invalid title never reaches the label diff.
       - run: node ./tools/ci-tools.ts lint-pr-title
         env:

.github/workflows/release-nightly.yml

@@ -23,12 +23,7 @@ jobs:
         with:
           go-version-file: go.mod
           check-latest: true
-      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
-      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
-        with:
-          node-version: 24
-          cache: pnpm
-          cache-dependency-path: pnpm-lock.yaml
+      - uses: ./.github/actions/node-setup
       - run: make deps-frontend deps-backend
       # xgo build
       - run: make release

.github/workflows/release-tag-rc.yml

@@ -24,12 +24,7 @@ jobs:
         with:
           go-version-file: go.mod
           check-latest: true
-      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
-      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
-        with:
-          node-version: 24
-          cache: pnpm
-          cache-dependency-path: pnpm-lock.yaml
+      - uses: ./.github/actions/node-setup
       - run: make deps-frontend deps-backend
       # xgo build
       - run: make release

.github/workflows/release-tag-version.yml

@@ -27,12 +27,7 @@ jobs:
         with:
           go-version-file: go.mod
           check-latest: true
-      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
-      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
-        with:
-          node-version: 24
-          cache: pnpm
-          cache-dependency-path: pnpm-lock.yaml
+      - uses: ./.github/actions/node-setup
       - run: make deps-frontend deps-backend
       # xgo build
       - run: make release