make new composite elliptic-curve isogenies the default

[yyyyx4]

Since #32744, Sage has a specialized class EllipticCurveHom_composite for composite elliptic-curve isogenies which is designed to behave the same as other, non-factored isogenies.

In this patch, we change the default composition for EllipticCurveHom instances from generic formal composite morphisms to the specialized implementation.

Depends on #34409

CC: @JohnCremona

Component: elliptic curves

Author: Lorenz Panny

Branch/Commit: 7326051

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/34410

[sagetrac-git]

Commit: 701f1bc

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

fd50425	remove experimental warnings for composite elliptic-curve isogenies
701f1bc	change default composition of EllipticCurveHom to EllipticCurveHom_composite

[sagetrac-git]

Changed commit from 701f1bc to b33e5da

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

41ed8a7	remove experimental warnings for composite elliptic-curve isogenies
c9726da	change default composition of EllipticCurveHom to EllipticCurveHom_composite
b33e5da	remove methods deprecated in #32744

[sagetrac-git]

Changed commit from b33e5da to 7326051

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

7326051

Merge tag '9.8.beta1' into public/change_default_composition_for_elliptic_curve_isogenies

[tscrim]

Reviewer: Travis Scrimshaw

[tscrim]

comment:5

LGTM.

[vbraun]

Changed branch from public/change_default_composition_for_elliptic_curve_isogenies to 7326051