Translate "by <AVATAR LINK>" in Environments

Some long time technical debt clean up as part of improving the environments
page, as this should have been translated a long time ago.

app/assets/javascripts/environments/components/environment_item.vue

 <script>
-/* eslint-disable @gitlab/vue-require-i18n-strings */
-import { GlTooltipDirective, GlIcon, GlLink } from '@gitlab/ui';
+import { GlTooltipDirective, GlIcon, GlLink, GlSprintf } from '@gitlab/ui';
 import { isEmpty } from 'lodash';
 import { convertObjectPropsToCamelCase } from '~/lib/utils/common_utils';
 import { __, s__, sprintf } from '~/locale';
@@ -32,6 +31,7 @@ export default {
     ExternalUrlComponent,
     GlIcon,
     GlLink,
+    GlSprintf,
     MonitoringButtonComponent,
     PinComponent,
     DeleteComponent,
@@ -647,7 +647,8 @@ export default {
       </span>
 
       <span v-if="!isFolder && deploymentHasUser" class="text-break-word">
-        by
+        <gl-sprintf :message="s__('Environments|by %{avatar}')">
+          <template #avatar>
             <user-avatar-link
               :link-href="deploymentUser.web_url"
               :img-src="deploymentUser.avatar_url"
@@ -655,6 +656,8 @@ export default {
               :tooltip-text="deploymentUser.username"
               class="js-deploy-user-container float-none"
             />
+          </template>
+        </gl-sprintf>
       </span>
 
       <div v-if="showNoDeployments" class="commit-title table-mobile-content">
@@ -743,13 +746,16 @@ export default {
         </div>
         <div class="gl-display-flex">
           <span v-if="upcomingDeployment.user" class="text-break-word">
-            by
+            <gl-sprintf :message="s__('Environments|by %{avatar}')">
+              <template #avatar>
                 <user-avatar-link
                   :link-href="upcomingDeployment.user.web_url"
                   :img-src="upcomingDeployment.user.avatar_url"
                   :img-alt="upcomingDeploymentUserImageAltDescription"
                   :tooltip-text="upcomingDeployment.user.username"
                 />
+              </template>
+            </gl-sprintf>
           </span>
         </div>
       </div>

locale/gitlab.pot

@@ -12911,6 +12911,9 @@ msgstr ""
 msgid "Environments|Your feedback helps GitLab make environments better for you and other users. Participate and enter a sweepstake to win a USD 30 gift card."
 msgstr ""
 
+msgid "Environments|by %{avatar}"
+msgstr ""
+
 msgid "Environments|protected"
 msgstr ""