Build hls-alternate-number-format-plugin with stack.yaml (#2891)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: July541

stack.yaml

@@ -71,7 +71,6 @@ flags:
     pedantic: true
 
     ignore-plugins-ghc-bounds: true
-    alternateNumberFormat: false
     brittany: false
     haddockComments: false
     retrie: false