#4454 Clean up more tests and code

* Remove some tests we no longer need
* Delete blocks of redundant code
* Compress some tests together to simplify them
* Remove a little code for ancient linter versions
* Escape more executables we didn't escape before
* Rename a deno option that didn't match our conventions

test/linter/test_haskell_ghc.vader

@@ -4,9 +4,10 @@ Before:
 After:
   call ale#assert#TearDownLinterTest()
 
-Execute(The options should be used in the command):
+Execute(The default ghc command should be correct):
   AssertLinter 'ghc', 'ghc -fno-code -v0 %t'
 
+Execute(The ghc options should be configurable):
   let b:ale_haskell_ghc_options = 'foobar'
 
   AssertLinter 'ghc', 'ghc foobar %t'