lang/rustpython: Fix build with rust 1.76.0

Import upstream patch [1] to fix the following error:
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
  --> /wrkdirs/usr/ports/lang/rustpython/work/Parser-0.3.0/ast/src/impls.rs:60:1

[1] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270383

PR:		276920
Approved by:	portmgr (build fix blanket)

lang/rustpython/files/patch-Parser-0.3.0_ast_src_impls.rs

@@ -0,0 +1,34 @@
+From 29c4728dbedc7e69cc2560b9b34058bbba9b1303 Mon Sep 17 00:00:00 2001
+From: "Jeong, YunWon" <69878+youknowone@users.noreply.github.com>
+Date: Thu, 28 Dec 2023 01:36:46 +0900
+Subject: [PATCH] remove size assertions to avoid nightly error (#111)
+
+---
+ ast/src/impls.rs | 17 +++++++++--------
+ 1 file changed, 9 insertions(+), 8 deletions(-)
+
+diff --git a/ast/src/impls.rs b/ast/src/impls.rs
+index 594fadb3..8c788593 100644
+--- ../Parser-0.3.0/ast/src/impls.rs
++++ ../Parser-0.3.0/ast/src/impls.rs
+@@ -54,11 +54,12 @@ impl<R> Expr<R> {
+     }
+ }
+
+-#[cfg(target_arch = "x86_64")]
+-static_assertions::assert_eq_size!(crate::Expr, [u8; 72]);
+-#[cfg(target_arch = "x86_64")]
+-static_assertions::assert_eq_size!(crate::Stmt, [u8; 160]);
+-#[cfg(target_arch = "x86_64")]
+-static_assertions::assert_eq_size!(crate::Pattern, [u8; 96]);
+-#[cfg(target_arch = "x86_64")]
+-static_assertions::assert_eq_size!(crate::ExceptHandler, [u8; 64]);
++// TODO: make this a #[test] to avoid eq comparison
++// #[cfg(target_arch = "x86_64")]
++// static_assertions::assert_eq_size!(crate::Expr, [u8; 72]);
++// #[cfg(target_arch = "x86_64")]
++// static_assertions::assert_eq_size!(crate::Stmt, [u8; 160]);
++// #[cfg(target_arch = "x86_64")]
++// static_assertions::assert_eq_size!(crate::Pattern, [u8; 96]);
++// #[cfg(target_arch = "x86_64")]
++// static_assertions::assert_eq_size!(crate::ExceptHandler, [u8; 64]);