Revert "Switch all platforms artifacts to use the new build system"

This reverts commit 95c7ecd562029d7ff23ec303ba281234831a0d57.
diff --git a/jenkins/build-docs.jpl b/jenkins/build-docs.jpl
index 38b207f..e63ab73 100644
--- a/jenkins/build-docs.jpl
+++ b/jenkins/build-docs.jpl
@@ -77,6 +77,7 @@
       sh "tf-m-ci-scripts/build-docs.sh"
     }
     stage("Post") {
+      archiveArtifacts 'trusted-firmware-m/build/install/**'
       archiveArtifacts 'trusted-firmware-m/build/docs/**'
     }
   } catch (Exception e) {