This PR bumps the FlatBuffers version used by the backend to `24.3.25` (the latest version as of now).
Since the newer FlatBuffers releases come with prebuilt binaries for all platforms we target, we can simplify the build process by simply downloading the required `flatc` binary from the official FlatBuffers GitHub release page. This allows us to remove the dependency on `conda`, which was the only reliable way to get the outdated `flatc`.
The `conda` setup has been removed from the CI steps and the relevant code has been removed from the build script.
The FlatBuffers version is no longer hard-coded in the Rust build script, it is inferred from the `build.sbt` definition (similar to GraalVM).
# Important Notes
This does not affect the GUI binary protocol implementation.
While I initially wanted to update it, it turned out farly non-trivial.
As there are multiple issues with the generated TS code, it was significantly refactored by hand and it is impossible to automatically update it. Work to address this problem is left as [a future task](https://github.com/enso-org/enso/issues/9658).
As the Flatbuffers binary protocol is guaranteed to be compatible between versions (unlike the generated sources), there should be no adverse effects from bumping `flatc` only on the backend side.
Adds `Oracle GraalVM` configuration for some backend jobs. `Oracle GraalVM` jobs run only on Linux so far. The old jobs use `GraalVM CE`.
### Important Notes
- The JDK to download and use is deduced from the `JAVA_VENDOR` environment variable. By default, `GraalVM CE` is used.
- sbt can be started with both GraalVM CE and Oracle GraalVM without any warnings.
- If you try to start sbt with JDK from a different vendor, but with the same Java version, a warning is printed.
Current list of jobs in the `Engine CI` workflow (these jobs are visible on this PR, because they are scheduled to run on every PR):
- Engine (GraalVM CE) (linux, x86_64)
- Engine (GraalVM CE) (macos, x86_64)
- Engine (GraalVM CE) (windows, x86_64)
- **Engine (Oracle GraalVM) (linux, x86_64)**
- Scala Tests (GraalVM CE) (linux, x86_64)
- Scala Tests (GraalVM CE) (macos, x86_64)
- Scala Tests (GraalVM CE) (windows, x86_64)
- **Scala Tests (Oracle GraalVM) (linux, x86_64)**
- Standard Library Tests (GraalVM CE) (linux, x86_64)
- Standard Library Tests (GraalVM CE) (macos, x86_64)
- Standard Library Tests (GraalVM CE) (windows, x86_64)
- **Standard Library Tests (Oracle GraalVM) (linux x86_64)**
- Verify License Packages (linux, x86_64)
Benchmark Engine workflow (not visible on this PR, cannot schedule manually yet):
- Benchmark Engine (GraalVM CE)
- **Benchmark Engine (Oracle GraalVM)**
Benchmark Standard Libraries workflow (not visible on this PR, cannot schedule manually yet):
- Benchmark Standard Libraries (GraalVM CE)
- **Benchmark Standard Libraries (Oracle GraalVM)**
Removed `enso-types` crate which had only one reference in unused part of the code. Removed some unused dependencies from `Cargo.toml` files.
# Important Notes
CI has a similar hiccup as before. Please disregard this for now in the review.
This PR allows requesting a clean build when triggering the workflow through the manual dispatch.
Previously it was possible only by creating PR and adding the label to it.
This PR adds a native aarch64 target to our release process.
It also includes refactoring of workflow generation and minor tweaks:
* removing some workarounds in the generated action code that are not needed anymore;
* some version bumps that are harmless;
* release builds have cleaning enabled unconditionally.
Now the `clean` CI steps are run always for benchmarking jobs. We run the full `./run git-clean` before and after benchmarks. Benchmarks take long enough to make any savings by not cleaning negligible.
### Important Notes
This PR brings partial refactoring in the workflow generating code which was very dirty. I'll build on this further soon when adding proper aarch64 macOS support.
Also, some minor tweaks to the generation were made:
* not writing `always() &&` twice;
* run only the latter cleaning step for canceled jobs.
