vscode-solidity-server: fix keytar issue on darwin

[suicide]

Similarly to #449891 vscode-solidity-server (solidity-language-server) fails building on darwin:

error: builder for '/nix/store/cwxpbgnasv9kc61gaks6llb25wlf4lzy-solidity-language-server-0.0.185.drv' failed with exit code 1;
       last 25 log lines:
       > npm error gyp info spawn args 'build',
       > npm error gyp info spawn args '-Goutput_dir=.'
       > npm error gyp info spawn args ]
       > npm error gyp info spawn make
       > npm error gyp info spawn args [ 'BUILDTYPE=Release', '-C', 'build' ]
       > npm error In file included from ../src/async.cc:4:
       > npm error ../../node-addon-api/napi.h:1147:39: error: in-class initializer for static data member is not a constant expression
       > npm error  1147 |     static const napi_typedarray_type unknown_array_type = static_cast<napi_typedarray_type>(-1);
       > npm error       |                                       ^                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       > npm error ../../node-addon-api/napi.h:1147:60: note: integer value -1 is outside the valid range of values [0, 15] for the enumeration type 'napi_typedarray_type'
       > npm error  1147 |     static const napi_typedarray_type unknown_array_type = static_cast<napi_typedarray_type>(-1);
       > npm error       |                                                            ^
       > npm error 1 error generated.
       > npm error make: *** [keytar.target.mk:126: Release/obj.target/keytar/src/async.o] Error 1
       > npm error gyp ERR! build error
       > npm error gyp ERR! stack Error: `make` failed with exit code: 2
       > npm error gyp ERR! stack at ChildProcess.<anonymous> (/nix/store/7hnbd3z2flnqh17fh3sbk0srpn6zvzck-nodejs-22.19.0/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:219:23)
       > npm error gyp ERR! System Darwin 24.6.0
       > npm error gyp ERR! command "/nix/store/7hnbd3z2flnqh17fh3sbk0srpn6zvzck-nodejs-22.19.0/bin/node" "/nix/store/7hnbd3z2flnqh17fh3sbk0srpn6zvzck-nodejs-22.19.0/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
       > npm error gyp ERR! cwd /private/tmp/nix-build-solidity-language-server-0.0.185.drv-0/source/node_modules/keytar
       > npm error gyp ERR! node -v v22.19.0
       > npm error gyp ERR! node-gyp -v v11.2.0
       > npm error gyp ERR! not ok
       > npm error Log files were not written due to an error writing to the directory: /nix/store/zxxv9hg40fm76qm5fp36zsgk3cdb768x-solidity-language-server-0.0.185-npm-deps/_logs
       > npm error You can rerun the command with `--loglevel=verbose` to see the logs in your terminal
       For full logs, run:
         nix log /nix/store/cwxpbgnasv9kc61gaks6llb25wlf4lzy-solidity-language-server-0.0.185.drv

The fix from #450202 works here as well until upstream can fix the problem

Things done

• Built on platform:
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• Tested, as applicable:
  • NixOS tests in nixos/tests.
  • Package tests at passthru.tests.
  • Tests in lib/tests or pkgs/test for functions and "core" functionality.
• Ran nixpkgs-review on this PR. See nixpkgs-review usage.
• Tested basic functionality of all binary files, usually in ./result/bin/.
• Nixpkgs Release Notes
  • Package update: when the change is major or breaking.
• NixOS Release Notes
  • Module addition: when adding a new NixOS module.
  • Module update: when the change is significant.
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other READMEs.

---

Add a 👍 reaction to pull requests you find important.