feat(RingTheory/Ideal/GoingUp): a prime ideal is minimal over the image of its preimage

[tb65536]

This PR proves that if A/R is integral and if I is a prime ideal of A, then I is a minimal prime over the image of its preimage in R.

---

[github-actions]

PR summary 77a248fac3

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

---

Declarations diff

+ IsIntegral.mem_minimalPrimes_map_under

You can run this locally as follows

## from your `mathlib4` directory:
git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci

## summary with just the declaration names:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh in the mathlib-ci repository contains some details about this script.

---

No changes to strong technical debt.

No changes to weak technical debt.