Merge branch 'parallelize-valgrind-job' into 'v90-bugfix'

Parallelize valgrind ci job

See merge request integer/scip!3391

ci/valgrind.yml

@@ -2,6 +2,8 @@ valgrind:
   stage: test
   image:
     name: debian:12-slim
+  tags:
+    - compile
   needs:
     - "cmake release with debug info"
   script:
@@ -16,7 +18,7 @@ valgrind:
     - $CI_PROJECT_DIR/SCIP-*-Linux.sh --skip-license
     - cd ${CI_PROJECT_DIR}
 
-    - make test EXECUTABLE=scipbuild/bin/scip TEST=short_valgrind OPT=opt EXCLUSIVE=false MEM=12000 QUEUE=opt-low DEBUGTOOL=valgrind TIME=60
+    - make test MAXJOBS=8 EXECUTABLE=scipbuild/bin/scip TEST=short_valgrind OPT=opt EXCLUSIVE=false MEM=12000 QUEUE=opt-low DEBUGTOOL=valgrind TIME=60
     - nfailed=$((grep fail ${CI_PROJECT_DIR}/check/results/check*.res || true) | wc -l)
     - if [ "$nfailed" == '0' ]; then exit 0; fi
     - failed=`grep fail ${CI_PROJECT_DIR}/check/results/check*.res`