ci-cygwin: Refactor using reusable workflows #33791
Description
We refactor ci-cygwin-standard.yml using the new reusable workflow cygwin.yml (see https://docs.github.com/en/actions/using-workflows/reusing-workflows for this new GH Actions feature).
We also remove ci-cygwin-minimal.yml; this configuration has not run successfully for a long time, and there is no expectation that it will be fixed.
The workflow includes optional steps that are useful for upstream CIs. First uses:
- Refactor sage CI latte-int/latte#27 (Test run: https://github.com/latte-int/latte/runs/6285228441)
- GH Actions workflow for continuous integration and portability testing fricas/fricas#102
Depends on #33782
CC: @dimpase @kliem @tobiasdiez
Component: porting: Cygwin
Author: Matthias Koeppe
Branch: e221c50
Reviewer: Dima Pasechnik
Issue created by migration from https://trac.sagemath.org/ticket/33791