`ogma-core`: Remove dependency on `IfElse`. Refs #150.

[ivanperez-keera]

Replace uses of definitions from IfElse with other functions from base, as prescribed in the solution proposed for #150.

[ivanperez-keera]

Change Manager: Verified that:

• Solution is implemented:

  • [X] The code proposed compiles passes the tests. Details:
  • Build logs:
    • https://github.com/nasa/ogma/actions/runs/10980588665/job/30486565255
    • https://github.com/nasa/ogma/actions/runs/10980588664/job/30486565078
  • Build log archives:
    • logs_28691603236.zip
    • logs_28691603237.zip
  • [X] The solution proposed fixes the issues described. The following docker file checks that no cabal package depends on IfElse, in which case it prints the message success:

    
    FROM ubuntu:focal

  RUN apt-get update

  RUN apt-get install --yes git

  SHELL ["/bin/bash", "-c"] CMD git clone $REPO \ && cd $NAME \ && git checkout $COMMIT \ && ! grep -niHre 'IfElse' --include='*.cabal' ogma** \ && echo "Success"

  Command:

  docker run -e "REPO=https://github.com/ivanperez-keera/ogma" -e "NAME=ogma" -e PAT="ogma-" -e "COMMIT=0db6542adbeeba654f4d011126a30a6adeeadb81" -it ogma-verify-150

• [X] Implementation is documented. Details: No need for updates to documentation.
• [X] Change history is clear.
• [X] Commit messages are clear.
• [X] Changelogs are updated.
• [X] Examples are updated. Details: No examples affected.
• [X] Required version bumps are evaluated. Details: No update needed; the improvement reduces dependencies.