Migrate accessibility rule a11y_disabled_attribute from dotcom to erblint-github

[bolonio]

Context

The motivation of erblint-github is to open-source our accessibility rules so non-GitHub people can benefit from them, have a space to provide comprehensive rule documentation, and also allow rules to be shared between Rails projects.

This PR migrates the accessibility rule a11y_disabled_attribute from dotcom to erblint-github

Related issue

• https://github.com/github/accessibility/issues/1293

[accessibility-bot]

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