ci: Add deployment of multi-thread variant via DEEP-SEA CI.

Using parallel matrix feature of Gitlab CI to add the deployment of the multi-threaded variant of psmpi via the DEEP-SEA CI.

This variant is required on the DEEP system by @piedrahta-velez1.

.gitlab-ci.yml

@@ -23,9 +23,14 @@ create_tarball:
 
 trigger-downstream:
   stage: staging
+  parallel:
+    matrix:
+      - PSMPI_EB_FILE:
+        - psmpi-5.9.2-1-GCC-11.3.0.eb
+        - psmpi-5.9.2-1-GCC-11.3.0-mt.eb
   variables:
     BUILD_INVERSE_DEPENDENCIES: 'FALSE'
-    EB_FILE_CURRENT: "psmpi-5.9.2-1-GCC-11.3.0.eb"
+    EB_FILE_CURRENT: '${PSMPI_EB_FILE}'
     SRC: '${CI_PIPELINE_ID}.tar.gz'
   trigger:
     project: deep-sea/wp3/software/easybuild-repository-deep-sea