Fix serialization of phases with reactions from multiple YAML sections

[ischoegl]

Changes proposed in this pull request

Information on reactions in the phase input section is kept in user data, but cannot be used for the serialization, as there is no bookkeeping of where reactions originated. As it is not essential to retain this information, the user input is deleted.

If applicable, fill in the issue number this pull request is fixing

Closes #1522

If applicable, provide an example illustrating new features this pull request is introducing

See example provided in #1522.

Checklist

• The pull request includes a clear description of this code change
• Commit messages have short titles and reference relevant issues
• Build passes (scons build & scons test) and unit tests address code coverage
• Style & formatting of contributed code follows contributing guidelines
• The pull request is ready for review

[codecov]

Codecov Report

Merging #1552 (c4e1fe3) into main (5f1014c) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1552   +/-   ##
=======================================
  Coverage   70.46%   70.47%           
=======================================
  Files         379      379           
  Lines       59091    59093    +2     
  Branches    21228    21230    +2     
=======================================
+ Hits        41641    41643    +2     
  Misses      14369    14369           
  Partials     3081     3081           

Impacted Files	Coverage Δ
src/base/Solution.cpp	79.56% <100.00%> (+0.22%)	⬆️

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[speth]

Works for me.