(cabal check) Add “Internal library” test

On impossible version ranges for internal libraries.

Author: ffaf1

cabal-testsuite/PackageTests/Check/ConfiguredPackage/Fields/ImpossibleVersionRangeLib/cabal.out

@@ -0,0 +1,4 @@
+# cabal check
+Warning: The package will not build sanely due to these errors:
+Warning: The package has an impossible version range for a dependency on an internal library: pkg:internal >1.0. This version range does not include the current package, and must be removed as the current package's library will always be used.
+Warning: Hackage would reject this package.

cabal-testsuite/PackageTests/Check/ConfiguredPackage/Fields/ImpossibleVersionRangeLib/cabal.test.hs

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+import Test.Cabal.Prelude
+
+-- Impossible version range for internal library.
+main = cabalTest $
+  fails $ cabal "check" []

cabal-testsuite/PackageTests/Check/ConfiguredPackage/Fields/ImpossibleVersionRangeLib/pkg.cabal

@@ -0,0 +1,18 @@
+cabal-version: 3.0
+name: pkg
+synopsis: synopsis
+description: description
+version: 0
+category: example
+maintainer: [email protected]
+license: GPL-3.0-or-later
+
+library
+  exposed-modules: Module
+  build-depends: base == 4.*,
+                 internal > 1.0
+  default-language: Haskell2010
+
+library internal
+  exposed-modules: Module
+  default-language: Haskell2010