[lldb] Cleanup dyld_process_t after constructing SharedCacheInfo (llvm#106157)

Without calling `dyld_process_dispose`, LLDB will leak the memory
associated with the `dyld_process_t`.

rdar://134738265

Author: bulbazord

lldb/source/Host/macosx/objcxx/HostInfoMacOSX.mm

@@ -650,12 +650,15 @@ static bool ResolveAndVerifyCandidateSupportDir(FileSpec &path) {
   if (!dyld_process)
     return false;
 
+  auto cleanup_process_on_exit =
+      llvm::make_scope_exit([&]() { dyld_process_dispose(dyld_process); });
+
   dyld_process_snapshot_t snapshot =
       dyld_process_snapshot_create_for_process(dyld_process, nullptr);
   if (!snapshot)
     return false;
 
-  auto on_exit =
+  auto cleanup_snapshot_on_exit =
       llvm::make_scope_exit([&]() { dyld_process_snapshot_dispose(snapshot); });
 
   dyld_shared_cache_t shared_cache =