swift-toolchain.yml can still be triggered directly via workflow_dispatch. But sometimes it's useful to trigger it with the same defaults that our scheduled builds use (e.g. publish_artifacts = true, use azure runners, etc...). Adding a workflow_dispatch trigger to schedule-swift-toolchain.yml allows us to do this.
This PR also reverts to using the x64 Azure VMs. We are not ready to build on arm64 hosts yet, and the PR that switched to Azure was only tested on x64.
swift-toolchain.ymlcan still be triggered directly via workflow_dispatch. But sometimes it's useful to trigger it with the same defaults that our scheduled builds use (e.g.publish_artifacts = true, use azure runners, etc...). Adding aworkflow_dispatchtrigger toschedule-swift-toolchain.ymlallows us to do this.This PR also reverts to using the x64 Azure VMs. We are not ready to build on arm64 hosts yet, and the PR that switched to Azure was only tested on x64.