suzerain: #3022 Remove T_e from qoi_match

Also...
 1. rename gam0 -> gamma as was done in writeup.
 1. remove stale Te setting from radialflow_specification.

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suzerain: #3022 cevdstag -> cevisslam

Better, more descriptive name for the option in anticipation
of moving the data out into its own file.

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suzerain: fix dox typo

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