Merge branch 'cleanup_ci_config' into 'main'

cleanup ci config

See merge request !16

.gitlab-ci.yml

 include:
-  - remote: "https://gitlab.esrf.fr/workflow/ewoks/ewoks/raw/main/.gitlab-ci-template.yml"
+  - remote: https://gitlab.esrf.fr/workflow/ewoks/ewoks/raw/main/.gitlab-ci-template.yml
 
 test-3.6:
-  extends: ".test-3.6"
+  extends: .test-3.6
 
 build_sdist:
-  extends: ".build_sdist"
+  extends: .build_sdist
 
 test_sdist-3.6:
-  extends: ".test_sdist-3.6"
+  extends: .test_sdist-3.6
 
 build_doc:
-  extends: ".build_doc"
+  extends: .build_doc
 
 pages:
-  extends: ".pages"
+  extends: .pages