Modularization of sagelib: Distribution sagemath-gsl

[mkoeppe]

The distribution sagemath-gsl will contain all modules of the Sage library that have a dependency on GSL:

• sage.libs.gsl
• sage.calculus.integration, sage.calculus.ode, sage.calculus.transforms
• sage.probability.probability_distribution

Preparation:

• sage.symbolic: Remove direct use of gsl #32699 sage.symbolic: Remove direct use of gsl
• sage.rings.real_double: Move methods using GSL to a separate extension module #32677 sage.rings.real_double: Move methods using GSL to a separate extension module

Component: refactoring

Issue created by migration from https://trac.sagemath.org/ticket/32700