fix: enable filter_hrun with beagle file in dumpSTR

[Buuxx]

This PR enables Beagle imputed files to run with filter_hrun in dumpSTR.

Deleted the section in dumpSTR that checks is_beagle and filter_hrun. Updated the test case accordingly.

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BEGIN_COMMIT_OVERRIDE
fix: enable filter_hrun with beagle file in dumpSTR
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[gymreklab]

Looks great, thanks!