(cabal check) Add "Autogen modules" test for exes

All in `autogen-modules` has to be present either in `other-modules`
or `exposed-modules`.

cabal-testsuite/PackageTests/Check/ConfiguredPackage/Sanity/AutogenExposedOtherExe/cabal.out

+# cabal check
+Warning: The package will not build sanely due to these errors:
+Warning: On executable 'exe' an 'autogen-module' is not on 'other-modules'
+Warning: Hackage would reject this package.

cabal-testsuite/PackageTests/Check/ConfiguredPackage/Sanity/AutogenExposedOtherExe/cabal.test.hs

+import Test.Cabal.Prelude
+
+-- All `autogen-modules` have to appear in `other-modules` or
+-- `exposed-modules` (executables).
+main = cabalTest $
+  fails $ cabal "check" []

cabal-testsuite/PackageTests/Check/ConfiguredPackage/Sanity/AutogenExposedOtherExe/pkg.cabal

+cabal-version: 3.0
+name: pkg
+synopsis: synopsis
+description: description
+version: 0
+category: example
+maintainer: none@example.com
+license: GPL-3.0-or-later
+
+executable exe
+  main-is: Main.hs
+  default-language: Haskell2010
+  autogen-modules: AutoGenMod