This adds the possibility to add a special `proc_macro.rs` source file
to QL tests, which will be generated into a `proc_macro` crate the
usual `lib` crate depends on.
This allow to define procedural macros in QL tests, and is here used to
move the `macro-expansion` integration test to be a language test
instead.
As the generated manifests involved were starting to get a bit complex,
they are now generated from a `mustache` template.
This required some code changes because of some breaking changes in
`clap` and `tree-sitter`.
Also needed to assign a new bazel repo name to the `crates_vendor` to
avoid name conflicts in `MODULE.bazel`.
The rust-analyzer update will need more work as it seems to break rust
analysis on windows.
This was carried out using `cargo upgrade` from `cargo-edit`:
* getting exclusions options for rust-analyzer with
```bash
cargo upgrade -i --dry-run | grep -o 'ra_ap_\S\+' | sort -u | sed 's/^/--exclude=/' > /tmp/exclude
```
* running
```bash
cargo upgrade -i $(cat /tmp/exclude)
misc/bazel/3rdparty/update_cargo_deps.sh
```
* The ungram file is now taken from the rust-analyzer dependencies
pulled in by bazel
* the grammar parsing code is not published, so it must be taken
directly from rust-analyzer code. That part should be less prone to be
updated than the ungram file, so it does not necessarily need to be
in sync with the rust-analyzer version is used elsewhere.
* both need some patches. The former is patched during build, the latter
during loading in `MODULE.bazel`.
This hack is meant to be an optimization when using install for tests,
where the install step is skipped if nothing changed. If the
installation directory is somehow messed up, `bazel run` can be used to
force install.
This is added as a `<name>-installer-as-test` target, which we can now
use in our internal pytest integration to skip the installation step if
nothing changed on the CLI + language packs side.
Previously, we were using 8.0.0rc1.
In particular, this upgrade means we need to explicitly
import more rules, as they've been moved out of the core bazel repo.
