Update matrix jobs to properly not execute when they don't have to

Author: leeyi45

.github/actions/src/info/action.yml

@@ -3,11 +3,11 @@ description: Gets which packages are currently present in the repository
 
 outputs:
   libs:
-    description: The list of library packages present
+    description: The list of library packages that have changes
   bundles:
-    description: The list of bundles packages present
+    description: The list of bundles packages that have changes
   tabs:
-    description: The list of tabs packages present
+    description: The list of tabs packages that have changes
   devserver:
     description: Information for the devserver
   docserver:

.github/workflows/pull-request.yml

@@ -48,6 +48,8 @@ jobs:
       workflows: ${{ steps.info.outputs.workflows }}
 
   libraries:
+    if: ${{ needs.find-packages.outputs.libs != '[]' }}
+
     needs: find-packages
     strategy:
       fail-fast: false
@@ -86,6 +88,8 @@ jobs:
         run: yarn workspaces foreach -A --include ${{ matrix.lib.name }} run tsc
 
   tabs:
+    if: ${{ needs.find-packages.outputs.tabs != '[]' }}
+
     runs-on: ubuntu-latest
     needs: find-packages
     strategy:
@@ -128,6 +132,8 @@ jobs:
           yarn tsc
 
   bundles:
+    if: ${{ needs.find-packages.outputs.bundles != '[]' }}
+
     runs-on: ubuntu-latest
     needs: find-packages
     strategy: