Configure required check for existing workflow actions.

[alexanderilyin]

Those should be passing for all PRs, and support wildcards for package names.

Validate devcontainer-feature.json files / validate (pull_request) Successful in 3s
CI - Test Features / test-autogenerated (starship, debian:latest) (pull_request) Successful in 33s
CI - Test Features / test-autogenerated (starship, ubuntu:latest) (pull_request) Successful in 33s
CI - Test Features / test-autogenerated (starship, mcr.microsoft.com/devcontainers/base:ubuntu) (pull_request) Successful in 29s
CI - Test Features / test-scenarios (starship) (pull_request) Successful in 43s
CI - Test Features / test-global (pull_request) Successful in 36s