Improve error message for --probe-tools

[sgillespie]

Addresses #4336. When resolving the runtime GHC throws an error, print it. Otherwise show the GHC version.

> haskell-language-server-wrapper --probe-tools
haskell-language-server version: 2.9.0.1 (GHC: 9.6.5) (PATH: /home/sgillespie/dev/haskell/haskell-language-server/dist-newstyle/build/x86_64-linux/ghc-9.6.5/haskell-language-server-2.9.0.1/x/haskell-language-server-wrapper/build/haskell-language-server-wrapper/haskell-language-server-wrapper) (GIT hash: 6f6f75bc410c51352e56a87a38a5345bdd44d0bb)
Tool versions found on the $PATH
cabal:          3.10.3.0
stack:          2.15.7
ghc:            9.6.5

Tool versions in your project
2024-08-20T20:42:48.640305Z | Debug | cabal exec -v0 -- ghc --print-libdir
Failed to find the GHC version of this Cabal project.
Error when calling cabal exec -v0 -- ghc --print-libdir

Errors encountered when parsing cabal file ./hls4336.cabal:

hls4336.cabal:20:39: error:
unexpected end of input
expecting white space

   17 |     main-is:          Main.hs
   18 |     -- other-modules:
   19 |     -- other-extensions:
   20 |     build-depends:    base >=4.18.2.1,
      |                                       ^

[fendor]

LGTM, thank you very much!