Add exceptions and stm to nonReinstallablePkgs for ghc901

We did not merge #1183 because we were concerned that it would change the  exceptions and stm used for users that did not want to build GHC. However `reinstallableLibGhc = true` is now the default and most projects should not be setting it to `false`.  That means this change will now only affect projects that likely want to use the built in `ghc` package.

Author: hamishmack

modules/component-driver.nix

@@ -90,7 +90,7 @@ in
    ] ++ lib.optional (!config.reinstallableLibGhc) "ghc"
     ++ lib.optionals (
       __elem config.compiler.nix-name ["ghc901" "ghc902" "ghc921" "ghc922" "ghc923" "ghc924" "ghc925" "ghc926" "ghc927" "ghc941" "ghc942" "ghc943" "ghc944" "ghc945" "ghc961" "ghc96020230302"]) [
-      "ghc-bignum" ]
+      "ghc-bignum" "exceptions" "stm"]
     ++ lib.optionals (
       __elem config.compiler.nix-name ["ghc941" "ghc942" "ghc943" "ghc944" "ghc945" "ghc961" "ghc96020230302"]) [
       "system-cxx-std-lib" ];