Glean-parser

- [data-review] Include extra keys' names and descriptions in data review template ([bug 1767027](https://bugzilla.mozilla.org/show_bug.cgi?id=1767027))
- Raise limit on number of statically-defined labels to 4096. ([bug 1772163](https://bugzilla.mozilla.org/show_bug.cgi?id=1772163))
- Fix Rust code generation for new UniFFI interface ([491](https://github.com/mozilla/glean_parser/pull/491), [#494](https://github.com/mozilla/glean_parser/pull/494), [#495](https://github.com/mozilla/glean_parser/pull/495))

- Relax version requirement for MarkupSafe.
Now works with MarkupSafe v1.1.1 to v2.0.1 inclusive again.

- BUGFIX: Add missing `extra_args` to Rust constructor generation ([bug 1765855](https://bugzilla.mozilla.org/show_bug.cgi?id=1765855))
- **Breaking change:** `glean_parser` now generates metrics compatible with the UniFFI-powered Glean SDK.
This is not backwards-compatible with previous versions.
- Generate Rate, Denominator and Numerator metrics for Kotlin and Swift
- Explicitly skip Rate, Denominator and Numerator metrics for JavaScript.
These will cause a build failure by default, but can be turned into warnings on request.
Use `-s fail_rates=false` to enable warning-only mode.

- BUGFIX: Revert changes made on v5.1.1.
- The issues addressed by those changes, were non-issues and result of misuse of the APIs.

- BUGFIX: Fix issues with Swift templates ([bug 1749494](https://bugzilla.mozilla.org/show_bug.cgi?id=1749494))
- Make metrics and pings all `public`
- Make pings `static`

- Add support for build info generation for JavaScript and Typescript targets ([bug 1749494](https://bugzilla.mozilla.org/show_bug.cgi?id=1749494))