#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_rflint_handler.vader

@@ -30,4 +30,3 @@ Execute(Warning and error messages should be handled correctly):
   \   'test.robot:W:1:2:RequireSuiteDocumentation:No suite documentation',
   \   'test.robot:E:3:4:RequireTestDocumentation:No testcase documentation'
   \])
-