Move pull_request_number to top of Fastfile

Co-authored-by: mokagio <[email protected]>

Author: Copilot

fastlane/Fastfile

@@ -29,6 +29,9 @@ WORKSPACE_PATH = File.join(PROJECT_ROOT_FOLDER, 'WooCommerce.xcworkspace')
 FIREBASE_APP_ID = '1:124902176124:ios:02259de1e7c42b291620f9'
 FIREBASE_TESTERS_GROUP = 'woocommerce-ios---prototype-builds'
 
+# Buildkite sets this env var to the PR number if on a PR, but to 'false' (and not nil) if not on a PR
+pull_request_number = ENV['BUILDKITE_PULL_REQUEST']&.then { |n| n == 'false' ? nil : Integer(n) }
+
 BUILDKITE_RELEASE_PIPELINE = 'release-builds.yml'
 IOS_LOCALES = %w[ar-SA de-DE en-US es-ES fr-FR he id it ja ko nl-NL pt-BR ru sv tr zh-Hans zh-Hant].freeze
 SIMULATOR_VERSION = '18.5' # For screenshots
@@ -1526,9 +1529,6 @@ TEST_ANALYTICS_ENVIRONMENT = %w[
 # Release Management Utils
 # -----------------------------------------------------------------------------------
 
-# Buildkite sets this env var to the PR number if on a PR, but to 'false' (and not nil) if not on a PR
-pull_request_number = ENV['BUILDKITE_PULL_REQUEST']&.then { |n| n == 'false' ? nil : Integer(n) }
-
 def create_backmerge_pr
   version = release_version_current