Use of obsolete members now generates warning

[JR-Morgan]

I noticed that we had several obsolete warnings erroneously supressed

This caused a minor incident, where a function was made Obsolete in the SDK and we didn't realise we'd missed updating several connectors to use it.

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This PR re-enables those warnings about using obsolete members
Additionally, I've resolved several violations against host app API members that were made obsolete.

I'm willing to accept us supressing some of these warnings (like in the case of civil, where a member was marked obsolete in 2022, but then was no longer obsolete in 2023).
Host app APIs don't tend to be quite as dev friendly as we'd always like. But for the cases here where there genuine reason to update to avoid obsolete API functions, lets keep on top of it!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 8.37%. Comparing base (774e24d) to head (df1eeb8).
Report is 1 commits behind head on dev.

Additional details and impacted files

@@          Coverage Diff          @@
##             dev    #378   +/-   ##
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  Coverage   8.37%   8.37%           
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  Files        237     237           
  Lines       4704    4704           
  Branches     513     513           
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  Hits         394     394           
  Misses      4294    4294           
  Partials      16      16           

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