Registering SliceVectorMethodGen for reflection

[JaroslavTulach]

Pull Request Description

Each builtin makeFunction method has to be currently registered for reflection. Adding registration of SliceVectorMethodGen to make following example work ag

enso$ sbt engine-runner-native/buildNativeImage
enso$ ./runner --run engine/runner-native/src/test/resources/Factorial.enso 6

Important Notes

Regression caused by #3724 - Once the above code is executed in the CI, we'll discover such breakages before integration.

Checklist

Please include the following checklist in your PR:

• The documentation has been updated if necessary.
• All code conforms to the
  Scala,
  Java,
  and
  Rust
  style guides.
• All code has been tested:
  • Unit tests have been written where possible.
  • If GUI codebase was changed: Enso GUI was tested when built using BOTH
    ./run ide build and ./run ide watch.

[ci no changelog needed]

[JaroslavTulach]

@hubertp, we could avoid listing the builtins in the reflect-config.json file, if we could read the config files and instantiate the nodes during build time - e.g. in some static class initializer. That way the reflection would be done before native image is generated - that would also decrease the size of the generated image, as the code for loading the config files wouldn't even be there.

... sounds like a good idea.

Reported as a story.

[hubertp]

@JaroslavTulach sounds like a good idea.