Runtime test build depends on fat jar classes

[4e6]

Pull Request Description

Followup to #8467

Fixes the issue when runtime/test command fails to compile without fat jar classes:

sbt:enso> runtime/test
[warn] JPMSPlugin: Directory /home/dbushev/projects/luna/enso/engine/runtime-fat-jar/target/scala-2.13/classes does not exist.
[warn] JPMSPlugin: Directory /home/dbushev/projects/luna/enso/engine/runtime-fat-jar/target/scala-2.13/classes does not exist.
[info] compiling 106 Scala sources and 60 Java sources to /home/dbushev/projects/luna/enso/engine/runtime/target/scala-2.13/test-classes ...
[warn] Unexpected javac output: error: module not found: org.enso.runtime
[warn] 1 error.
[warn] frgaal exited with exit code 1
[error] (runtime / Test / compileIncremental) javac returned non-zero exit code

Important Notes

Checklist

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

• The documentation has been updated, if necessary.
• 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.

[Akirathan]

Probably could have been achieved by adding

.dependsOn(`runtime-fat-jar` % "test->compile")

to the dependencies of runtime in

enso/build.sbt

Line 1734 in 21d164e

.dependsOn(`runtime-test-instruments` % "test->compile")

. But this should be even better. Thanks for the quick fix.