Allow multiple reconstruction recipes for sxt

[stephen-riggs]

This moves the SXT processing into a rabbitmq message, and adds support for more recipes.
Recipes in the machine config are detected and all of these are used to send processing if the collection type is SXT. This will allow for using imod and aretomo.

Links to DiamondLightSource/cryoem-services#258

[codecov]

Codecov Report

❌ Patch coverage is 59.09091% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.40%. Comparing base (8f00dbf) to head (910cf44).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #830      +/-   ##
==========================================
+ Coverage   53.10%   53.40%   +0.29%     
==========================================
  Files          99      100       +1     
  Lines       10817    10938     +121     
  Branches     1432     1445      +13     
==========================================
+ Hits         5744     5841      +97     
- Misses       4769     4788      +19     
- Partials      304      309       +5     

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