tools: enforce two arguments in assert.throws

Enables the requireTwo option of our custom rule.

PR-URL: #12270
Backport-PR-URL: #13785
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

.eslintrc.yaml

@@ -146,7 +146,7 @@ rules:
 
   # Custom rules in tools/eslint-rules
   align-multiline-assignment: 2
-  assert-throws-arguments: [2, { requireTwo: false }]
+  assert-throws-arguments: [2, { requireTwo: true }]
   no-useless-regex-char-class-escape: [2, { override: ['[', ']'] }]
 
 # Global scoped method and vars