#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/handler/test_scala_handler.vader

@@ -1,13 +1,10 @@
-After:
-  call ale#linter#Reset()
-
 Execute(The handler should return an empty list with empty input):
   AssertEqual [], ale#handlers#scala#HandleScalacLintFormat(bufnr(''), [])
 
 Execute(The handler should correctly parse error messages):
-  AssertEqual 
+  AssertEqual
   \ [
-  \   { 
+  \   {
   \     'lnum': 4,
   \     'col':  8,
   \     'text': ''':'' expected but identifier found.',