Re-map *tsector to *tilt_subsector

[maurolepore]

• Closes Change benchmark from tilt_sector and input_tilt_sector to tilt_subsector and input_tilt_subsector respectively #799
• Closes Change benchmark from tilt_sector to tilt_subsector #797

This PR replaces all uses of the column tilt_sector with tilt_subsector. It replaces #797 which seems correct but this PR takes a different approach (re-mapping the alias) which profits from the indirection that aka() provides.

Also I take the chance to replace multiple instances of hard-coded column names with the more maintainable calls to aka() -- leaving the camp a lil cleaner than we found it.

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TODO

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[maurolepore]

Closing in favor of #799