8362582: GHA: Increase bundle retention time to deal with infra overload better

Backport-of: 1bd683b5884e65a03d564976a9d9220ad0893776

Author: shipilev

.github/actions/build-jtreg/action.yml

@@ -65,4 +65,4 @@ runs:
       with:
         name: bundles-jtreg-${{ steps.version.outputs.value }}
         path: jtreg/installed
-        retention-days: 1
+        retention-days: 5

.github/actions/upload-bundles/action.yml

@@ -73,5 +73,5 @@ runs:
       with:
         name: bundles-${{ inputs.platform }}${{ inputs.debug-suffix }}
         path: bundles
-        retention-days: 1
+        retention-days: 5
       if: steps.bundles.outputs.bundles-found == 'true'