feat(reporters): add fileTemplate option to JUnit reporter

[mixelburg]

Fixes #10341

Adds a fileTemplate option to the JUnit reporter, analogous to the existing classnameTemplate. This lets users control the value of the file attribute on <testcase> elements and the name attribute on <testsuite> elements — useful in pnpm monorepos where the default relative path may not include enough prefix for test analytics or CODEOWNERS matching.

Usage

// string template with {filename} and {filepath} placeholders
reporters: [['junit', { fileTemplate: 'packages/{filename}/src', addFileAttribute: true }]]

// function template
reporters: [['junit', { fileTemplate: ({ filepath }) => filepath.replace(/.*fixtures\//, ''), addFileAttribute: true }]]

Unlike classnameTemplate, which only affects the classname attribute, fileTemplate affects both file and testsuite name while leaving classname unchanged (unless classnameTemplate is also set).

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[sheremet-va]

Seems like your branch is outdated, clanker

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[TylerJang27]

@AriPerkkio I think this would work for me. Can you look into getting this landed?

[sheremet-va]

Closing this as this AI clanker account has been known to be inactive in comments and ignores any reviews. Their account is also blocked