[CI] Refactor composite action task-cache (#9583)

## Introduction
In this previous PR https://github.com/twentyhq/twenty/pull/9448 we've
refactored the storybook build caching flow to be using the new
[actions/cache](https://github.com/actions/cache) `restore` and `save`
functions, which significantly improve caching operations duration.

In this way, in this PR, we've standardize both of the `restore` and
`save` by refactoring the `task-cache` composite action. By creating two
new composite actions `save-cache` and `restore-cache` that centralize
the paths to cache and the way to compute the primary key.

## Misc
- **If no cache** is hit, then a job duration will long for its task
duration and nothing else, previously the cache upload would sometimes
take up to 3 mins.
- **if cache** is hit, then mainly the only time consuming step is the
dependencies installation ( which is theory is also cached, in fact
twice. We will be having a look on this issue in an upcoming PR )

.github/workflows/ci-server.yaml

@@ -10,6 +10,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  SERVER_SETUP_CACHE_KEY: server-setup
+
 jobs:
   server-setup:
     timeout-minutes: 30
@@ -57,11 +60,12 @@ jobs:
       - name: Build twenty-shared
         if: steps.changed-files.outputs.any_changed == 'true'
         run: npx nx build twenty-shared
-      - name: Server / Restore Task Cache
+      - name: Restore server setup
+        id: restore-server-setup-cache
         if: steps.changed-files.outputs.any_changed == 'true'
-        uses: ./.github/workflows/actions/task-cache
+        uses: ./.github/workflows/actions/restore-cache
         with:
-          tag: scope:backend
+          key: ${{ env.SERVER_SETUP_CACHE_KEY }}
       - name: Server / Run lint & typecheck
         if: steps.changed-files.outputs.any_changed == 'true'
         uses: ./.github/workflows/actions/nx-affected
@@ -103,6 +107,11 @@ jobs:
             
             exit 1
           fi
+      - name: Save server setup
+        if: steps.changed-files.outputs.any_changed == 'true' && steps.restore-server-setup-cache.outputs.cache-hit != 'true'
+        uses: ./.github/workflows/actions/save-cache
+        with:
+          key: ${{ steps.restore-server-setup-cache.outputs.cache-primary-key }}
 
   server-test:
     timeout-minutes: 30
@@ -129,11 +138,11 @@ jobs:
       - name: Install dependencies
         if: steps.changed-files.outputs.any_changed == 'true'
         uses: ./.github/workflows/actions/yarn-install
-      - name: Server / Restore Task Cache
+      - name: Restore server setup
         if: steps.changed-files.outputs.any_changed == 'true'
-        uses: ./.github/workflows/actions/task-cache
+        uses: ./.github/workflows/actions/restore-cache
         with:
-          tag: scope:backend
+          key: ${{ env.SERVER_SETUP_CACHE_KEY }}
       - name:  Server / Run Tests
         if: steps.changed-files.outputs.any_changed == 'true'
         uses: ./.github/workflows/actions/nx-affected
@@ -191,11 +200,11 @@ jobs:
           echo "BILLING_STRIPE_API_KEY=test-api-key" >> .env.test
           echo "BILLING_STRIPE_BASE_PLAN_PRODUCT_ID=test-base-plan-product-id" >> .env.test
           echo "BILLING_STRIPE_WEBHOOK_SECRET=test-webhook-secret" >> .env.test
-      - name: Server / Restore Task Cache
+      - name: Restore server setup
         if: steps.changed-files.outputs.any_changed == 'true'
-        uses: ./.github/workflows/actions/task-cache
+        uses: ./.github/workflows/actions/restore-cache
         with:
-          tag: scope:backend
+          key: ${{ env.SERVER_SETUP_CACHE_KEY }}
       - name: Server / Run Integration Tests
         if: steps.changed-files.outputs.any_changed == 'true'
         uses: ./.github/workflows/actions/nx-affected