Add JUnitXmlReporter

[nowsprinting]

Changes

• Add JUnitXmlReporter (based on internal JUnitReporter class)
• Remove junitReportPath from AutopilotSettings, and add convert to JUnitXmlReporter
• Mod test-helper package version for running tests

Priority

I hope to your review && merge around one week.
There is no need to release it yet.

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[get-me-power]

@nowsprinting

Runtime/Settings/AutopilotSettings.cs is conflicted.
Will you resolve conflicts?

[nowsprinting]

@get-me-power san, rebased!

[asurato]

Although I commented a little, LGTM.

[asurato]

@nowsprinting
Thank you for your contribution!

[asurato]

@nowsprinting

Relative path from the project root directory. When run on player, relative path from the Application.persistentDataPath.

The latter sentence make sense slightly, but the structure of the sentence is broken.
Please consider to use Relative path from the project root directory or the Application.persistentDataPath in runs on player. if you see this comment.

[nowsprinting]

Thanks, @asurato san,

Change the relative-path-root to "output root path field in AutopilotSetings", later.
This makes it easier to write.
However, I want to express that absolute paths can also be specified.