Upload coverage data to codecov.io

[pcrov]

This should make code coverage available at https://app.codecov.io/gh/php/php-src looking similar to this minimal test I did via github actions https://app.codecov.io/gh/pcrov/php-src.

[carusogabriel]

Appreciate this one 🙏

Since we moved to MS Azure, the Coverage information is only limited to admins, it's not open source. Once, and if, we merge this one, I'll spread the news, I had a bunch of PHP user groups asking me about it to bring back the PHP Test Fest

[nikic]

@carusogabriel I believe this bug was fixed at some point (can you access https://dev.azure.com/phpazuredevops/PHP/_build/results?buildId=13322&view=codecoverage-tab ?). But even if accessible, it's not easy to find...

[carusogabriel]

@nikic Thanks for sharing it, I didn't know. I have a bug report at bugs.php.net, I'll mention it there.

I can access it but indeed, it's not easy to find

[nikic]

Looks like it did something at least. Not seeing anything on codecov.io though. Does it need to be merged into master first?

[pcrov]

@nikic https://app.codecov.io/gh/php/php-src will show whatever is set up as the default branch for the default project dashboard, which should by default be master. Default default default. You can see what just ran at https://app.codecov.io/gh/php/php-src/branch/merge (found via the Branches tab.)

[nikic]

@pcrov Thanks. I tried that before, but nothing showed up ... apparently their interface is broken (at least in Firefox) and you need to reload the page after navigating to the branch.