utils/pypi: allow overwriting resource patches

[cho-m]

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---

Mainly to prevent autobump from failing whenever we have patched resources. This allows PR to be created and then a maintainer may need to restore patch. Not too different than what we might manually do (i.e. remove patch, brew update-python-resources ..., re-apply patch).

Can consider carrying over patches on identical versions later on.

---

One example usage is dvc after Homebrew/homebrew-core#166343

Before:

❯ brew update-python-resources dvc
==> Retrieving PyPI dependencies for "dvc[all]==3.48.4"...
==> Retrieving PyPI dependencies for excluded "certifi cryptography numpy"...
==> Getting PyPI info for "adlfs==2024.2.0"
==> Getting PyPI info for "aiobotocore==2.12.1"
...
==> Getting PyPI info for "zc-lockfile==3.0.post1"
==> Updating resource blocks
Error: Unable to update resource blocks for "dvc" automatically. Please update them manually.

After:

❯ brew update-python-resources dvc
==> Retrieving PyPI dependencies for "dvc[all]==3.48.4"...
==> Retrieving PyPI dependencies for excluded "certifi cryptography numpy"...
==> Getting PyPI info for "adlfs==2024.2.0"
==> Getting PyPI info for "aiobotocore==2.12.1"
...
==> Getting PyPI info for "zc-lockfile==3.0.post1"
==> Updating resource blocks

❯ git diff
diff --git a/Formula/d/dvc.rb b/Formula/d/dvc.rb
index 0af6302e9a3..14ec4b11b2e 100644
--- a/Formula/d/dvc.rb
+++ b/Formula/d/dvc.rb
@@ -581,12 +581,6 @@ class Dvc < Formula
   resource "pyarrow" do
     url "https://files.pythonhosted.org/packages/ac/f8/38a8498b294a6d3c74cd81bb411c510d52dfdd40d082651ded761fa7a964/pyarrow-15.0.1.tar.gz"
     sha256 "21d812548d39d490e0c6928a7c663f37b96bf764034123d4b4ab4530ecc757a9"
-
-    # Backport fix for Cython 3.0.9+
-    patch :p2 do
-      url "https://github.com/apache/arrow/commit/1d966e98e41ce817d1f8c5159c0b9caa4de75816.patch?full_index=1"
-      sha256 "3272126cb6726744cfeb770513eb2b8b105b7926a38477a6bbd4aa0352beb6d5"
-    end
   end

   resource "pyasn1" do

[MikeMcQuaid]

Makes sense thanks @cho-m!