Update to flint 3

[thofma]

We are slowly converging to a point, where we could/should update to flint 3. We already have PRs adjusting Nemo and Hecke. They just need to be merged:

• Adjust Nemo.jl (Update FLINT_jll Nemocas/Nemo.jl#1568)
• Adjust Hecke.jl (Adjust to flint 3 thofma/Hecke.jl#1475)
• Adjust Singular.jl (feat: bump to flint3 Singular.jl#801)
• Adjust AlgebraicSolving.jl (Bump depdendencies and tag 0.4.15 algebraic-solving/AlgebraicSolving.jl#53)
• rebuild binaries for Singular ([Singular] rebuild for new flint version JuliaPackaging/Yggdrasil#8546)
• rebuild binaries for normaliz ([normaliz] bump to 3.10.2 JuliaPackaging/Yggdrasil#8541)
• rebuild binaries for polymake ([polymake] rebuild polymake for new flint and normaliz JuliaPackaging/Yggdrasil#8545)
• rebuild binaries for libsingular_julia ([libsingular_julia] rebuild for flint 3 JuliaPackaging/Yggdrasil#8579)
• rebuild binaries for libpolymake_julia ([libpolymake_julia] rebuild for flint 3 JuliaPackaging/Yggdrasil#8578)
• rebuild binaries for polymake_oscarnumber
• rebuild msolve

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.11%. Comparing base (c6300cf) to head (6571f18).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3689      +/-   ##
==========================================
- Coverage   83.12%   83.11%   -0.01%     
==========================================
  Files         577      577              
  Lines       78306    78311       +5     
==========================================
  Hits        65090    65090              
- Misses      13216    13221       +5     

Files	Coverage Δ
src/Serialization/Fields.jl	94.71% <100.00%> (ø)

... and 3 files with indirect coverage changes

[lgoettgens]

If it works, it works