Add Spell Check error summary to reusable workflow (backport #950)

[mergify]

Description

This adds a new step to the reusable workflow that lists the spell check errors produced during the test step.
See it in action here

@Mergifyio backport 3.1.x 3.0.x 2.14.x 2.10.x 2.6.x

Contributor Checklist

• Commit messages follow the project guidelines.
• N/A Code snippets related to the added documentation have been provided.
• Documentation tests pass locally.
• Applicable backports have been included in the description.

Reviewer Checklist

• The PR has a milestone assigned.
• The title and description correctly express the PR's purpose.
• Check contributor checklist is correct.
• CI passes without warnings or errors.

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This is an automatic backport of pull request #950 done by [Mergify](https://mergify.com).

[JesusPoderoso]

LGTM