* VAULT-33074: add `github` sub-command to `pipeline`
Investigating test workflow failures is common task that engineers on the
sustaining rotation perform. This task often requires quite a bit of
manual labor by manually inspecting all failed/cancelled workflows in
the Github UI on per repo/branch/workflow basis and performing root cause
analysis.
As we work to improve our pipeline discoverability this PR adds a new `github`
sub-command to the `pipeline` utility that allows querying for such workflows
and returning either machine readable or human readable summaries in a single
place. Eventually we plan to automate sending a summary of this data to
an OTEL collector automatically but for now sustaining engineers can
utilize it to query for workflows with lots of various criteria.
A common pattern for investigating build/enos test failure workflows would be:
```shell
export GITHUB_TOKEN="YOUR_TOKEN"
go run -race ./tools/pipeline/... github list-workflow-runs -o hashicorp -r vault -d '2025-01-13..2025-01-23' --branch main --status failure build
```
This will list `build` workflow runs in `hashicorp/vault` repo for the
`main` branch with the `status` or `conclusion` of `failure` within the date
range of `2025-01-13..2025-01-23`.
A sustaining engineer will likely do this for both `vault` and
`vault-enterprise` repositories along with `enos-release-testing-oss` and
`enos-release-testing-ent` workflows in addition to `build` in order to
get a full picture of the last weeks failures.
You can also use this utility to summarize workflows based on other
statuses, branches, HEAD SHA's, event triggers, github actors, etc. For
a full list of filter arguments you can pass `-h` to the sub-command.
> [!CAUTION]
> Be careful not to run this without setting strict filter arguments.
> Failing to do so could result in trying to summarize way too many
> workflows resulting in your API token being disabled for an hour.
Signed-off-by: Ryan Cragun <me@ryan.ec>
