Improve organization of CI workflow scripts and pip requirements (#45037)

.github/workflows/bootstrap.yml

@@ -152,7 +152,7 @@ jobs:
                 not_found=0
                 old_path="$PATH"
                 export PATH="$ver_dir:$PATH"
-                ./bin/spack-tmpconfig -b ./.github/workflows/bootstrap-test.sh
+                ./bin/spack-tmpconfig -b ./.github/workflows/bin/bootstrap-test.sh
                 export PATH="$old_path"
               fi
             fi
@@ -166,4 +166,3 @@ jobs:
           source share/spack/setup-env.sh
           spack -d gpg list
           tree ~/.spack/bootstrap/store/
-