Add back oxrocksdb-sys to the main workspace

Having it separated was failing fuzz tests for some unknown reason

This reverts commit d97eb9eb31.
This reverts commit 4927b3148e.

Cargo.toml

@@ -7,11 +7,11 @@ members = [
     "lib/spargebra",
     "lib/sparesults",
     "lib/sparql-smith",
+    "oxrocksdb-sys",
     "python",
     "server",
     "testsuite"
 ]
-exclude = ["oxrocksdb-sys"]
 
 [profile.release]
 lto = true