Hadrian: Stop using in-tree Cabal

hadrian/cabal.project

 packages: ./
-          ../libraries/Cabal/Cabal/
 
 -- N.B. Compile with -O0 since this is not a performance-critical executable
 -- and the Cabal takes nearly twice as long to build with -O1. See #16817.

hadrian/ci.project

 packages: ./
-          ../libraries/Cabal/Cabal/
 
 package hadrian
     ghc-options: -Werror

hadrian/hadrian.cabal

@@ -123,7 +123,7 @@ executable hadrian
     other-extensions:    MultiParamTypeClasses
                        , TypeFamilies
     build-depends:       base                 >= 4.8     && < 5
-                       , Cabal                >= 3.0     && < 3.2
+                       , Cabal                >= 3.0     && < 3.1
                        , containers           >= 0.5     && < 0.7
                        , directory            >= 1.3.1.0 && < 1.4
                        , extra                >= 1.4.7

hadrian/stack.yaml

-resolver: lts-13.21
+resolver: lts-14.7
 
 extra-deps:
 - happy-1.19.12
-- shake-0.18.3@sha256:12949a47f07915a4338291a0146158d18abdd04c0dfd813778231ed68b4758df,14806
+- Cabal-3.0.0.0@sha256:1ba37b8d80e89213b17db7b8b9ea0108da55ca65f8c0cbb7433881a284c5cf67
 
 packages:
 - '.'
-- '../libraries/Cabal/Cabal'
 
 nix:
    enable: false