Respect output mode 'none' even when caching is disabled

[aholland]

Description

Suppose I have some pipline like this:

//turbo.json
{
  "$schema": "https://turbo.build/schema.json",
  "pipeline": {
    "clean": {
      "outputMode": "none",
      "cache": false
    },
    "build": {
      "dependsOn": ["clean","^build"],

The outputMode is ignored because of cache being false. That's annoying. I don't want to see my rm -rf running every time I do I build, including builds where all the rest of the tasks are cached (I tend to use new-only for most other tasks).

Testing Instructions

I am not a Rust programmer but I think I have found the place that would need to be changed. To test the change, just create any simple package.son task that generates output ( "echo": "echo \"hello world\"",) and run it from a TurboRepo task with caching false and outMode none, as above.

PS errors-only

PS having absolutely no output would be okay. Even better would be an implementation of errors-only, outputting one line saying that the task has been executed because it is set not to cache, and that it executed successfully. I think that would involve something like the below code (copied from about line 195 of the same file I've modified in this PR), but again, I don't know Rust or your codebase:

                fallible_write(
                    &mut terminal_output,
                    &format!(
                        "cache bypass, force executing {}\n",
                        color!(self.ui, GREY, "{}", self.hash)
                    ),
                );

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