added trimControlStructures property configuration option to spring boot starters

[jarebudev]

This PR changes the spring boot starters so that if you are using them in development mode, you can now set the property to trim control structures to remove the whitespace. This enables you to produce the same output as seen in production if you are using the trimControlStructures option in the maven/gradle plugins to generate production templates. Also useful when writing unit tests for a rendered template so you don't have to cater for whitespace when asserting output.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.17%. Comparing base (d3f4f10) to head (5092623).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #480      +/-   ##
============================================
- Coverage     91.24%   91.17%   -0.07%     
+ Complexity     1224     1223       -1     
============================================
  Files            76       76              
  Lines          3174     3174              
  Branches        492      492              
============================================
- Hits           2896     2894       -2     
- Misses          168      169       +1     
- Partials        110      111       +1     

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[edward3h]

Seems reasonable to me. Thank you for your contribution.