Do not run enterprise engine and stdlib benchmarks

[Akirathan]

Pull Request Description

Benchmark Engine and Benchmark Standard Libraries GH Actions have been running both GraalVM CE and Oracle GraalVM versions. This PR removes the job that runs benchmarks on Oracle GraalVM. We don't use results from these benchmarks so far, and they make benchmark runtime twice as slow.

Oracle GraalVM jobs were added in #9322.

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,
  TypeScript,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• Unit tests have been written where possible.