minor symfony#2865 Run JS tests under multiple JS versions, define .nvmrc to 22.6 (Kocal)

This PR was merged into the 2.x branch.

Discussion
----------

Run JS tests under multiple JS versions, define .nvmrc to 22.6

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Docs?         | no <!-- required for new features -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

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In a second PR, I want to be able to run TypeScript natively with Node.js, for `bin/*.js` scripts. This is doable with Node.js 22.6+ with `--experimental-strip-types example.ts` flag, see https://nodejs.org/en/learn/typescript/run-natively.

I'm configuring the version through `.nvmrc` (related to https://github.com/nvm-sh/nvm) instead of specifying it in `package.json` `engines.node`, otherwise it became an hard requirement making us impossible to run Node.js <22 (making impossible to run our JS tests for different major Node.js releases like 18 and 20).

Commits
-------

058599d Run JS tests under multiple JS versions, define .nvmrc to 22.6

Author: Kocal

.github/workflows/app-tests.yaml

@@ -35,6 +35,7 @@ jobs:
 
         - uses: actions/setup-node@v4
           with:
+            node-version-file: '.nvmrc'
             cache: 'yarn'
             cache-dependency-path: |
               yarn.lock

.github/workflows/code-quality.yaml

@@ -25,6 +25,7 @@ jobs:
             - run: npm i -g corepack && corepack enable
             - uses: actions/setup-node@v4
               with:
+                node-version-file: '.nvmrc'
                 cache: 'yarn'
             - run: yarn --immutable
             - run: yarn ci

.github/workflows/dist-files-unbuilt.yaml

@@ -24,6 +24,7 @@ jobs:
       - run: npm i -g corepack && corepack enable
       - uses: actions/setup-node@v4
         with:
+          node-version-file: '.nvmrc'
           cache: 'yarn'
           cache-dependency-path: |
             yarn.lock

.github/workflows/release-on-npm.yaml

@@ -24,6 +24,7 @@ jobs:
           - run: npm i -g corepack && corepack enable
           - uses: actions/setup-node@v4
             with:
+              node-version-file: '.nvmrc'
               cache: 'yarn'
               cache-dependency-path: |
                 yarn.lock

.github/workflows/unit-tests.yaml

@@ -87,11 +87,16 @@ jobs:
 
     js:
         runs-on: ubuntu-latest
+        strategy:
+            fail-fast: false
+            matrix:
+                node-version: [ '18.x', '20.x', '22.x', '24.x' ]
         steps:
             - uses: actions/checkout@v4
             - run: npm i -g corepack && corepack enable
             - uses: actions/setup-node@v4
               with:
+                node-version: ${{ matrix.node-version }}
                 cache: 'yarn'
                 cache-dependency-path: |
                   yarn.lock

.nvmrc

@@ -0,0 +1 @@
+22.6