Improve the Lagrangian distribution models

Summary

• Consolidate min/max operands by migrating local min/max operands to the parent class
• Add new sanity checks
• Modernise the code style
• Replace input variable names with the corresponding de facto conventions in statistics
• Fix sample and mean function predictions for the normal, multiNormal, RosinRammler and massRosinRammler distributions
• Add cumulative distribution function into the general distribution
• Improve header file documentation

Resolved bugs

Closes #1996 (closed)

Risks

• No changes in output except for bug fixes in normal and multiNormal distributions
• No changes to user input
  • Ensured backward compatibility for new input entries

Tests

• Compilation (incl. submodules):
  • linux64ClangDPInt32Opt (clang11)
  • linux64GccDPInt32Opt
  • linux64GccSPDPInt64Debug
• Alltest: No change in output + no error
• Verification: distribution models without CFD