Run more of the deploy code for pre-releases (#1440)

.github/workflows/build_prepare.yaml

@@ -15,6 +15,11 @@ on:
                 required: false
                 default: false
                 description: "Whether the build is a Nightly and to calculate the version strings new builds should use"
+            deploy:
+                type: boolean
+                required: false
+                default: false
+                description: "Whether the build should be deployed to production"
         secrets:
             # Required if `nightly` is set
             CF_R2_ACCESS_KEY_ID:
@@ -29,10 +34,13 @@ on:
             packages-dir:
                 description: "The directory non-deb packages for this run should live in within packages.element.io"
                 value: ${{ inputs.nightly && 'nightly' || 'desktop' }}
-            # This is just a simple pass-through of the input to simplify reuse of complex inline conditions
+            # These are just simple pass-throughs of the input to simplify reuse of complex inline conditions
             config:
                 description: "The relative path to the config file for this run"
                 value: ${{ inputs.config }}
+            deploy:
+                description: "The relative path to the config file for this run"
+                value: ${{ inputs.deploy }}
 jobs:
     prepare:
         name: Prepare