Proposed Changes

Initialization of a flame using a spark or flame sheet is now also possible with restart files.
Additionally, there was an error in mpi causing lookup values to show discrepancies at mpi interfaces.

PR Checklist

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• I am submitting my contribution to the develop branch.
• My contribution generates no new compiler warnings (try with --warnlevel=3 when using meson).
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• I used the pre-commit hook to prevent dirty commits and used pre-commit run --all to format old commits.
• I have added a test case that demonstrates my contribution, if necessary.
• I have updated appropriate documentation (Tutorials, Docs Page, config_template.cpp), if necessary.