Feature request: look for test-runner-jest.config.js first from config dir specified with -c

[diginikkari]

When using storybook test runner in monorepo it's possible to have multiple different storybooks and specify which to run by using --config-dir argument. When one has ejected storybook config, the config file is looked from root of the project. This will be used always and can't be specified. It would be good to be able to locate ejected config -file from .storybook folder. Then there could be different configs for each different storybook.

[github-actions]

🚀 Issue was released in v0.10.0 🚀