add workaround for gitlab ci needs limit (#17219)

* add workaround for gitlab ci needs limit

* fix style/address review comments

* convert filter obj to list

* update command completion

* remove dict comprehension

* add workaround tests

* fix sorting issue between disparate types

* add indeces to format

share/spack/spack-completion.bash

@@ -474,7 +474,7 @@ _spack_ci() {
 }
 
 _spack_ci_generate() {
-    SPACK_COMPREPLY="-h --help --output-file --copy-to --spack-repo --spack-ref --optimize"
+    SPACK_COMPREPLY="-h --help --output-file --copy-to --spack-repo --spack-ref --optimize --dependencies"
 }
 
 _spack_ci_rebuild() {