[crowdin] Invalidate existing translations when source strings change (#1188)

Don't upload existing translation when syncing with Crowdin. This way,
we let the existing translations be invalidated when we change the
source string (this was not happening previously since we also upload
the (older) translations when
we upload the changed source strings).

**Tested by**

Doing this on a different test branch, changing a source string,
manually running the workflow against that branch, and verifying that
the strings are getting reset in the PR that Crowdin' action opens.

.github/workflows/auth-crowdin.yml

@@ -28,7 +28,7 @@ jobs:
                   base_path: "auth/"
                   config: "auth/crowdin.yml"
                   upload_sources: true
-                  upload_translations: true
+                  upload_translations: false
                   download_translations: true
                   localization_branch_name: crowdin-translations-auth
                   create_pull_request: true

.github/workflows/mobile-crowdin.yml

@@ -28,7 +28,7 @@ jobs:
                   base_path: "mobile/"
                   config: "mobile/crowdin.yml"
                   upload_sources: true
-                  upload_translations: true
+                  upload_translations: false
                   download_translations: true
                   localization_branch_name: crowdin-translations-mobile
                   create_pull_request: true

.github/workflows/web-crowdin.yml

@@ -34,7 +34,7 @@ jobs:
                   base_path: "web/"
                   config: "web/crowdin.yml"
                   upload_sources: true
-                  upload_translations: true
+                  upload_translations: false
                   download_translations: true
                   localization_branch_name: crowdin-translations-web
                   create_pull_request: true