[IT-4720] revert to sceptre parallel deploy (#1503)

We changed Sceptre to deploy service catalog cloudformation templates
serially in PR #1498 to get around an AWS throttling issue.

AWS has confirmed that a change on their end caused this problem
and they have reverted their change.  From that we are reverting
our change so that we can deploy cloudformation in parallel again.

Author: zaro0508

.github/workflows/deploy.yaml

@@ -118,7 +118,7 @@ jobs:
       role-to-assume: "arn:aws:iam::465877038949:role/sagebase-github-oidc-sage-bionetworks-it"
       working-dir: "sceptre/scipool"
       role-session-name: ${{ needs.org-formation.outputs.role-session-name }}
-      sceptre-command: "sceptre launch develop --prune --yes --max-concurrency 1"
+      sceptre-command: "sceptre launch develop --prune --yes"
   sceptre-scipoolprod:
     needs: [org-formation]
     uses: "./.github/workflows/aws-scipool.yaml"
@@ -127,7 +127,7 @@ jobs:
       role-to-assume: "arn:aws:iam::237179673806:role/sagebase-github-oidc-sage-bionetworks-it"
       role-session-name: ${{ needs.org-formation.outputs.role-session-name }}
       working-dir: "sceptre/scipool"
-      sceptre-command: "sceptre launch prod --prune --yes --max-concurrency 1"
+      sceptre-command: "sceptre launch prod --prune --yes"
   sceptre-stridespool:
     needs: [org-formation, sceptre-strides]
     uses: "./.github/workflows/aws-scipool.yaml"
@@ -136,15 +136,15 @@ jobs:
       role-to-assume: "arn:aws:iam::423819316185:role/github-oidc-sage-bionetworks-it"
       role-session-name: ${{ needs.org-formation.outputs.role-session-name }}
       working-dir: "sceptre/scipool"
-      sceptre-command: "sceptre launch strides --prune --yes --max-concurrency 1"
+      sceptre-command: "sceptre launch strides --prune --yes"
   sceptre-sageit-staging:
     needs: [org-formation]
     uses: "./.github/workflows/aws-deploy.yaml"
     with:
       role-to-assume: "arn:aws:iam::797640923903:role/sagebase-github-oidc-sage-bionetworks-it"
       role-session-name: ${{ needs.org-formation.outputs.role-session-name }}
       working-dir: "sceptre/sageit"
-      sceptre-command: "sceptre launch staging --prune --yes --max-concurrency 1"
+      sceptre-command: "sceptre launch staging --prune --yes"
   sceptre-sageit-prod:
     needs: [org-formation]
     uses: "./.github/workflows/aws-deploy.yaml"