fix(summary): no longer display non existent logfile (#9907)
### Description
Closes #9903
If caching is disabled, then we don't cache the task logs. We shouldn't
display a path to a log file that doesn't exist.
### Testing Instructions
Run a task that doesn't get cached with `--summarize` and make sure that
`logFile` isn't present:
```
[0 olszewski@macbookpro] /tmp/summarize-colon-missing-logfile $ turbo_dev --skip-infer colon:command --summarize
turbo 2.4.1-canary.0
• Packages in scope: app-a, app-b, pkg-a, pkg-b, tooling-config
• Running colon:command in 5 packages
• Remote caching disabled
pkg-a:colon:command: cache bypass, force executing 71e88464fc594d21
pkg-a:colon:command:
pkg-a:colon:command:
pkg-a:colon:command: > colon:command
pkg-a:colon:command: > echo "Colon command!"
pkg-a:colon:command:
Colon command!
Tasks: 1 successful, 1 total
Cached: 0 cached, 1 total
Time: 230ms
Summary: /private/tmp/summarize-colon-missing-logfile/.turbo/runs/2sfbsk4LTfEuhw4VWPU60jJMmdi.json
[0 olszewski@macbookpro] /tmp/summarize-colon-missing-logfile $ rg -F 'logFile' .turbo/runs/2sfbsk4LTfEuhw4VWPU60jJMmdi.json
[1 olszewski@macbookpro] /tmp/summarize-colon-missing-logfile $
```
