Use native Spack commands in CI. (#114)

Author: jrood-nrel

.github/workflows/ci.yml

@@ -37,13 +37,11 @@ jobs:
       - name: Tests
         run: |
           /bin/bash -c " \
-            cd ${EXAWIND_MANAGER} && git checkout main && git pull origin main && \
             source ${EXAWIND_MANAGER}/start.sh && spack-start && \
-            quick-create-dev -n my-env -s exawind@master && \
-            cd ${EXAWIND_MANAGER}/environments/my-env && \
-            rm -rf exawind && \
+            spack env activate e4s-build && \
+            cd ${EXAWIND_MANAGER}/environments/e4s-build && \
             ln -s ${GITHUB_WORKSPACE} exawind && \
-            spack manager external ${EXAWIND_MANAGER}/environments/e4s-build --exclude exawind && \
+            spack develop --no-clone exawind@=master && \
             spack concretize -f && \
             spack install && \
             spack cd -b exawind && \