Fix make exec-hash script

[SidestreamColdMelon]

Goal

exec-hash script is working or related check from the reviewer checklist is removed

Context

• Running script currently returns error on mac

date: illegal option -- d
usage: date [-jnRu] [-I[date|hours|minutes|seconds]] [-f input_fmt]
            [-r filename|seconds] [-v[+|-]val[y|m|w|d|H|M|S]]
            [[[[mm]dd]HH]MM[[cc]yy][.SS] | new_date] [+output_fmt]

• Additional problem is inconsistent exec-doc name
  • Executive Vote in exec doc name will make the script fail (Error: Executive vote not found) as the script was develop to work with Executive vote

Potential solutions

• Rewrite script from shell to another language (eg python)
• Simplify script (eg do not try to find exec doc in the repo)
• Remove script and relevant checklist