fix_1126, 3547 - junit xml schema violation

[rustyhowell]

Junit has changed the xsd. Testcase no longer has file or line attrs.
Testsuite's attr "skips" has been renamed to "skipped"

This commit will fix the attr name or comment out the deleted attrs

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[RonnyPfannschmidt]

please run the black pre-commit hook to be in line with the expected code formatting

also its not quite clear to me how to pull this in, as even tho it fixes actual issues, its a breaking change due to following breaking changes in the spec

CC @nicoddemus

[rustyhowell]

@RonnyPfannschmidt , your're right. This is a breaking change. See my comments on #3777