Fix Benchmark processor when run from a root directory with different name than "enso"

[Akirathan]

Fix Benchmark processor when run from a root directory with different name than "enso"

Pull Request Description

This PR fixes commands like std-benchmarks/benchOnly Startup for users that have enso clonned in multiple directories with different names.

Important Notes

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• All code has been tested:
  • Unit tests have been written where possible.
  • If GUI codebase was changed, the GUI was tested when built using ./run ide build.