fix: should support chunk.contentHash in PathData of compilation.getPath

[LingyuCoder]

Summary

Should render [contenthash] with combining chunk.contentHash and contentHashType in PathData of compilation.getPath

• Add contentHashType to PathData
• Use pathData.chunk.contentHash[pathData.contentHashType] instead when pathData.contentHash is None
• Need to pass the output.hashDigestLength to render of filename template which need it to generate final contentHash strings

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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