tools: remove align-multiline-assignment lint rule

In preparation for stricter indentation linting, remove the
align-multiline-assignment custom rule, as it may conflict with the
ESLint stricter indentation linting.

Backport-PR-URL: #14835
PR-URL: #14079
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

Author: Trott

.eslintrc.yaml

@@ -166,7 +166,6 @@ rules:
   template-curly-spacing: 2
 
   # Custom rules in tools/eslint-rules
-  align-multiline-assignment: 2
   assert-throws-arguments: [2, { requireTwo: true }]
 
 # Global scoped method and vars