Taskcluster-taskgraph

Added

- `--target-kind` flag can be passed to Taskgraph multiple times
- Ability to specify max worker processes when generating graphs in parallel

Fixed

- `taskgraph.parameters._get_defaults` no longer raises outside of a repository

Fixed

- Exception when running `taskgraph load-image` and `taskgraph build-image`
- Missing Github ssh fingerprints for `ed25519` and `ecdsa-sha2-nistp256` keys in `run-task`
- Improved error message for unsupported repos when running `taskgraph init`
- Stopped assuming `origin` remote in `taskgraph init`
- Suppressed expected stderr logging when running `taskgraph init`

Added

- Don't override all existing dependencies in `from-deps` (allow upstream or downstream transforms to also add them)

Fixed

- Don't add a `fetches` entry for kinds without artifacts defined in `from-deps`
- Sort fetches by key and artifact to ensure a consistent ordering

Added

- A new `chunking` transform that helps parallelize tasks
- Support for adding `fetches` with `from-deps`
- An option for not overriding task `name` with `from-deps`
- `autoCancelPreviousChecks` is set to `true` when initializing a new GitHub repository with `taskgraph init`

Added

- Support for substituting arbitrary parts of a task definition with `task-context`

Removed

- `command-context` support in `job` transforms (this can now be implemented with `task-context`)

Fixed

- Complain when `group_by` functions are attempted to registered twice
- Use `validate_schema` in `from_deps` to avoid breaking `--fast`

Added

- Ability to specify a list of kinds in the `enable_always_target` parameter

Fixed

- Assertion that payload and index builder names are unique
- Error handling when duplicate `run_using` functions are defined