Add termination for record writer to save record file correctly

[Elros60]

Calling terminate function for RecordWriter when terminating aligner instance, making sure the millerecord file will be written to disk correctly.

[github-actions]

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[Elros60]

Building test failed for build/O2/o2/aarch64 and build/O2/o2_slc9, error msg pointed to:

This should not relate to my current PR right?

[shahor02]

failures unrelated, merging.