Merge pull request #303245 from annaleaves/duckdb-filedescriptors

duckdb: increase file descriptors for installCheck

pkgs/development/libraries/duckdb/default.nix

···
     in
     ''
       runHook preInstallCheck
+      (($(ulimit -n) < 1024)) && ulimit -n 1024
 
       HOME="$(mktemp -d)" ${LD_LIBRARY_PATH}="$lib/lib" ./test/unittest ${toString excludes}