tools: enable camelcase linting in tools

PR-URL: https://github.com/nodejs/node/pull/27607
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

tools/.eslintrc.yaml

@@ -3,6 +3,11 @@ env:
   es6: true
 
 rules:
+  camelcase:
+    - error
+    - properties: 'never'
+      ignoreDestructuring: true
+      allow: ['child_process']
   comma-dangle:
     - error
     - arrays: 'always-multiline'