Deduplicate type determination code in build workflow

The "Arduino IDE" GitHub Actions workflow is used to generate several distinct types of builds:

- Tester builds of commits
- Nightly builds
- Release builds

Different actions must be performed depending on which type of build is being produced. The workflow contains code that
uses various criteria to determine the build type.

Previously that code was duplicated in multiple places:

- The packaging job
- The changelog generation job
- The nightly build publishing job
- The release publishing job

This duplication is avoided by moving the code to a dedicated job that makes the build type information available to all
subsequent jobs via outputs.

.github/workflows/build.yml

@@ -60,10 +60,43 @@ jobs:
 
           echo "result=$RESULT" >> $GITHUB_OUTPUT
 
-  build:
-    name: build (${{ matrix.config.name }})
+  build-type-determination:
     needs: run-determination
     if: needs.run-determination.outputs.result == 'true'
+    runs-on: ubuntu-latest
+    outputs:
+      is-release: ${{ steps.determination.outputs.is-release }}
+      is-nightly: ${{ steps.determination.outputs.is-nightly }}
+    permissions: {}
+    steps:
+      - name: Determine the type of build
+        id: determination
+        run: |
+          if [[
+            "${{ startsWith(github.ref, 'refs/tags/') }}" == "true"
+          ]]; then
+            is_release="true"
+            is_nightly="false"
+          elif [[
+            "${{ github.event_name }}" == "schedule" ||
+            (
+              "${{ github.event_name }}" == "workflow_dispatch" &&
+              "${{ github.ref }}" == "refs/heads/main"
+            )
+          ]]; then
+            is_release="false"
+            is_nightly="true"
+          else
+            is_release="false"
+            is_nightly="false"
+          fi
+
+          echo "is-release=$is_release" >> $GITHUB_OUTPUT
+          echo "is-nightly=$is_nightly" >> $GITHUB_OUTPUT
+
+  build:
+    name: build (${{ matrix.config.name }})
+    needs: build-type-determination
     strategy:
       matrix:
         config:
@@ -120,8 +153,8 @@ jobs:
           AC_TEAM_ID: ${{ secrets.AC_TEAM_ID }}
           AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
           AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-          IS_NIGHTLY: ${{ github.event_name == 'schedule' || (github.event_name == 'workflow_dispatch' && github.ref == 'refs/heads/main') }}
-          IS_RELEASE: ${{ startsWith(github.ref, 'refs/tags/') }}
+          IS_NIGHTLY: ${{ needs.build-type-determination.outputs.is-nightly }}
+          IS_RELEASE: ${{ needs.build-type-determination.outputs.is-release }}
           CAN_SIGN: ${{ secrets[matrix.config.certificate-secret] != '' }}
         run: |
           # See: https://www.electron.build/code-signing
@@ -190,7 +223,9 @@ jobs:
           path: ${{ env.JOB_TRANSFER_ARTIFACT }}/${{ matrix.artifact.path }}
 
   changelog:
-    needs: build
+    needs:
+      - build-type-determination
+      - build
     runs-on: ubuntu-latest
     outputs:
       BODY: ${{ steps.changelog.outputs.BODY }}
@@ -203,7 +238,7 @@ jobs:
       - name: Generate Changelog
         id: changelog
         env:
-          IS_RELEASE: ${{ startsWith(github.ref, 'refs/tags/') }}
+          IS_RELEASE: ${{ needs.build-type-determination.outputs.is-release }}
         run: |
           export LATEST_TAG=$(git describe --abbrev=0)
           export GIT_LOG=$(git log --pretty=" - %s [%h]" $LATEST_TAG..HEAD | sed 's/ *$//g')
@@ -229,15 +264,19 @@ jobs:
           echo "$BODY" > CHANGELOG.txt
 
       - name: Upload Changelog [GitHub Actions]
-        if: github.event_name == 'schedule' || (github.event_name == 'workflow_dispatch' && github.ref == 'refs/heads/main')
+        if: needs.build-type-determination.outputs.is-nightly == 'true'
         uses: actions/upload-artifact@v3
         with:
           name: ${{ env.JOB_TRANSFER_ARTIFACT }}
           path: CHANGELOG.txt
 
   publish:
-    needs: changelog
-    if: github.repository == 'arduino/arduino-ide' && (github.event_name == 'schedule' || (github.event_name == 'workflow_dispatch' && github.ref == 'refs/heads/main'))
+    needs:
+      - build-type-determination
+      - changelog
+    if: >
+      github.repository == 'arduino/arduino-ide' &&
+      needs.build-type-determination.outputs.is-nightly == 'true'
     runs-on: ubuntu-latest
     steps:
       - name: Download [GitHub Actions]
@@ -257,8 +296,10 @@ jobs:
           AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
 
   release:
-    needs: changelog
-    if: startsWith(github.ref, 'refs/tags/')
+    needs:
+      - build-type-determination
+      - changelog
+    if: needs.build-type-determination.outputs.is-release == 'true'
     runs-on: ubuntu-latest
     steps:
       - name: Download [GitHub Actions]