[WIP] Contact Info block integration test

[fluiddot]

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Related to issue: https://github.com/wordpress-mobile/gutenberg-mobile/issues/3673

This PR adds an integration test for the Contact Info block (Jetpack).

Additionally, it updates the Jest configuration to able the integration tests:

• Add test helper to the module name mapper.
• Fixes transpiled packages calculation.

PR submission checklist:

• [ ] I have considered adding unit tests where possible.
• [ ] I have considered if this change warrants user-facing release notes more info and have added them to RELEASE-NOTES.txt if necessary.

[fluiddot]

@guarani @illusaen I was investigating how to include integration tests in Gutenberg Mobile and I realized that it was surprisingly easy 😄.

As an example, I added a test case for the Contact Info block, feel free to take over this PR if you want to finish the work.

[fluiddot]

I ran the test and it's working great. I'm not sure if this is still a draft because the test should be fleshed out a bit more, but leaving an approval in-case you want to merge as-is.

Thanks @guarani for the review ❤️ ! I left it in draft because we might want to add more test cases for the Contact info block, I hope to spare some time next week for this, extend the test and merge it.

[guarani]

I want to mention this proposal I just created, https://github.com/wordpress-mobile/gutenberg-mobile/issues/3942. In short, if we could add integration tests inside the Jetpack repo itself, there might be some wins in terms of code coverage tool compatibility and keeping app code and tests close together.