[test][prefix] Update root_folder path for macOS builds

beat/core/test/prefix/databases/empty_protocol_sets/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "double",

beat/core/test/prefix/databases/empty_protocols/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
     ]
 }

beat/core/test/prefix/databases/empty_set_outputs/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "double",

beat/core/test/prefix/databases/large/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "large",

beat/core/test/prefix/databases/missing_protocol_name/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "sets": [

beat/core/test/prefix/databases/missing_protocols/1.json

 {
-    "root_folder": "/path/not/set"
+    "root_folder": "/tmp/path/not/set"
 }

beat/core/test/prefix/databases/missing_set_name/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "double",

beat/core/test/prefix/databases/missing_set_outputs/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "double",

beat/core/test/prefix/databases/missing_set_view/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "double",

beat/core/test/prefix/databases/mixed_protocol_names/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "protocol",

beat/core/test/prefix/databases/mixed_set_names/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "double",

beat/core/test/prefix/databases/same_protocol_names/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "double",

beat/core/test/prefix/databases/same_set_names/1.json

 {
-    "root_folder": "/path/not/set",
+    "root_folder": "/tmp/path/not/set",
     "protocols": [
         {
             "name": "double",

beat/core/test/prefix/databases/simple/1.json

 {
-  "root_folder": "/foo/bar",
+  "root_folder": "/tmp/foo/bar",
   "protocols": [
     {
       "name": "protocol",