HPCC-32879 Fix issue with FileAttrLock being used on superfiles

[shamser]

For superfiles, use DXB_SuperFile for DfsXmlBranchKind argument in the CFileAttrLock::init() call.

(If this is not done, superfile's attributes cannot be locked as dali attempt to lock a non-existant path).

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Testing:

[github-actions]

Jira Issue: https://hpccsystems.atlassian.net//browse/HPCC-32879

Jirabot Action Result:
Workflow Transition To: Merge Pending
Updated PR

[jakesmith]

@shamser - looks good.

[github-actions]

Jirabot Action Result:
Added fix version: 9.6.62
Added fix version: 9.8.36
Workflow Transition: 'Resolve issue'