[ty] Include CPython projects in ecosystem-analyzer runs (#23995)
## Summary
There are three special projects in mypy_primer's list: they are all
part of the cpython repository, but in different subfolders. Previously,
`good.txt` only included the pattern "cpython" to include all of them
for mypy_primer runs. However, ecosystem-analyzer expects an exact
match. I don't really want to change that behavior in
ecosystem-analyzer, so instead, we now include the full project names,
and map those back to "cpython" for mypy_primer (which matches the regex
against the projects URL, not the name).
## Test Plan
- Made sure that mypy_primer still runs as expected, with the new
selector (regex-escaping leads to a slightly different project selector)
- Made sure that CPython projects are now included in ecosystem-analyzer
runs
