Revert "DPC-3979 Change sandbox to use prod tealium (#106)" (#107)

This reverts commit e422f2a.

## 🎫 Ticket

https://jira.cms.gov/browse/DPC-3979

## 🛠 Changes

Changes rolled back

## ℹ️ Context for reviewers

Confusion over "stage" and "sandbox" led to inappropriate rollout.

## ✅ Acceptance Validation

(How were the changes verified? Did you fully test the acceptance
criteria in the ticket? Provide reproducible testing instructions and
screenshots if applicable.)

## 🔒 Security Implications

- [ ] This PR adds a new software dependency or dependencies.
- [ ] This PR modifies or invalidates one or more of our security
controls.
- [ ] This PR stores or transmits data that was not stored or
transmitted before.
- [ ] This PR requires additional review of its security implications
for other reasons.

If any security implications apply, add Jason Ashbaugh (GitHub username:
StewGoin) as a reviewer and do not merge this PR without his approval.

_includes/_head.html

@@ -5,8 +5,10 @@
   <meta name="version" content="{{ site.version }}">
 
   <!-- Tealium Tag Manager - SYNC -->
-  {% if jekyll.environment == 'prod' or jekyll.environment == 'stage' %}
+  {% if jekyll.environment == 'prod' %}
   <script src="https://tags.tiqcdn.com/utag/cmsgov/cms-dpc/prod/utag.sync.js"></script>
+  {% elsif jekyll.environment == 'stage' %}
+  <script src="https://tags.tiqcdn.com/utag/cmsgov/cms-dpc/qa/utag.sync.js"></script>
   {% else %}
   <script src="https://tags.tiqcdn.com/utag/cmsgov/cms-dpc/dev/utag.sync.js"></script>
   {% endif %}

_layouts/default.html

@@ -17,8 +17,10 @@
   <script type="text/javascript">
     (function(a,b,c,d){
     var src_url = '';
-    {% if jekyll.environment == 'prod' or jekyll.environment == 'stage' %}
+    {% if jekyll.environment == 'prod' %}
     src_url = 'https://tags.tiqcdn.com/utag/cmsgov/cms-dpc/prod/utag.js';
+    {% elsif jekyll.environment == 'stage' %}
+    src_url = 'https://tags.tiqcdn.com/utag/cmsgov/cms-dpc/qa/utag.js';
     {% else %}
     src_url = 'https://tags.tiqcdn.com/utag/cmsgov/cms-dpc/dev/utag.js';
     {% endif %}