Linter: Implement autofix for erb-no-output-control-flow

[marcoroth]

Follow up on #2008.

This pull request makes erb-no-output-control-flow autocorrectable. Now that the offense message spells out the exact replacement, the rule can also apply it. The fix is a single token mutation, <%= becomes <%, which covers every shape the rule reports: if, unless, elsif, else, end and iteration blocks.

- <%= if condition? %>
+ <% if condition? %>
    <p>Content</p>
- <%= elsif another_condition? %>
+ <% elsif another_condition? %>
    <p>Content</p>
- <%= end %>
+ <% end %>

[github-actions]

🌿 Interactive Playground and Documentation Preview

A preview deployment has been built for this pull request. Try out the changes live in the interactive playground:

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_{🌱 Grown from commit 9930686}

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✅ Preview deployment has been cleaned up.

[pkg-pr-new]

npx https://pkg.pr.new/@herb-tools/formatter@2010

npx https://pkg.pr.new/@herb-tools/language-server@2010

npx https://pkg.pr.new/@herb-tools/linter@2010

commit: 9930686