mitmproxy: fix macos build

https://hydra.nixos.org/build/240114924/nixlog/1
```
error: linking with `/nix/store/sa6hywsm1mqfyd1xakyzv4ljjsb3hawh-clang-wrapper-11.1.0/bin/cc` failed: exit status: 1
  |
...
  = note: ld: library not found for -liconv
          clang-11: error: linker command failed with exit code 1 (use -v to see invocation)
```

after adding libiconv it starts to fail with
```
  File "/nix/store/ncs3h7zqjl3cl2cwflka40rrirb6qg1m-python3.11-mitmproxy-rs-0.3.11/lib/python3.11/site-packages/mitmproxy_rs/__init__.py", line 1, in <module>
    from .mitmproxy_rs import *
ModuleNotFoundError: No module named 'mitmproxy_macos'
```
so it needs extra module
https://github.com/mitmproxy/mitmproxy_rs/tree/main/mitmproxy-macos

So the fixes are
- add `libiconv` dependency to mitmproxy-rs
- add `mitmproxy-macos` python package and add it to dependencies of
  `mitmproxy-rs` and `mitmproxy` itself (otherwise import fails,
  looks like the import is sneaky because it is platform-conditional)

1 files changed, 2 insertions, 0 deletions

diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f0502b4eeb5..78f2c18e582 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6877,6 +6877,8 @@ self: super: with self; {
 
   mitmproxy = callPackage ../development/python-modules/mitmproxy { };
 
+  mitmproxy-macos = callPackage ../development/python-modules/mitmproxy-macos { };
+
   mitmproxy-rs = callPackage ../development/python-modules/mitmproxy-rs { };
 
   mitmproxy-wireguard = callPackage ../development/python-modules/mitmproxy-wireguard { };