python3-pydantic-core: upgrade 2.18.4 -> 2.21.0

* Refresh -crates.inc
* Drop rust 1.76 to 1.75 patch, upstream reverted [1]
* Add ptest RDEPENDS [2]:
  - python3-dateutil
  - python3-tzdata
  - python3-zoneinfo
* Add python3-misc to ptest RDEPENDS as we need Lib/timeit.py

Full commit log:
https://github.com/pydantic/pydantic-core/compare/v2.18.4...v2.21.0

[1] ebef5bdf92
[2] https://github.com/pydantic/pydantic-core/blob/v2.21.0/tests/requirements.txt

Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-devtools/python/python3-pydantic-core/0001-Set-rust-version-from-1.76-to-1.75-in-Cargo.toml.patch

@@ -1,29 +0,0 @@
-From 6e1852228a2aa38cc76b9a968bba6b603efa5b28 Mon Sep 17 00:00:00 2001
-From: Frank de Brabander <debrabander@gmail.com>
-Date: Thu, 25 Jul 2024 13:50:44 +0200
-Subject: [PATCH] Set rust version from 1.76 to 1.75 in Cargo.toml
-
-Current openembedded-core uses 1.75 and this packages doesn't actually
-require a newer version.
-
-Upstream-Status: Inappropriate
----
- Cargo.toml | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/Cargo.toml b/Cargo.toml
-index 8f0ea44..10b277c 100644
---- a/Cargo.toml
-+++ b/Cargo.toml
-@@ -24,7 +24,7 @@ include = [
-     "!tests/.pytest_cache",
-     "!*.so",
- ]
--rust-version = "1.76"
-+rust-version = "1.75"
- 
- [dependencies]
- pyo3 = { version = "0.21.2", features = ["generate-import-lib", "num-bigint"] }
--- 
-2.39.2
-