fix: move gitattributes files to node templates (#464)

Source-Author: F. Hinkelmann <franziska.hinkelmann@gmail.com>
Source-Date: Thu Jul 23 01:45:04 2020 -0400
Source-Repo: googleapis/synthtool
Source-Sha: 3a00b7fea8c4c83eaff8eb207f530a2e3e8e1de3
Source-Link: googleapis/synthtool@3a00b7f

.gitattributes

@@ -1,3 +1,4 @@
 *.ts text eol=lf
 *.js text eol=lf
 protos/* linguist-generated
+**/api-extractor.json  linguist-language=JSON-with-Comments

synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-monitoring.git",
-        "sha": "55c19b167dc270ed4c4247fa105b4e1485874dbc"
+        "sha": "1c775dd5644fd41cd5ed740771227201e74f99f8"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "99c93fe09f8c1dca09dfc0301c8668e3a70dd796"
+        "sha": "3a00b7fea8c4c83eaff8eb207f530a2e3e8e1de3"
       }
     }
   ],