Enable Layout/SpaceAfterColon for HAML in Rubocop

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Last part

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app/views/admin/broadcast_messages/_form.html.haml:2 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
app/views/admin/broadcast_messages/_form.html.haml:10 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
app/views/groups/settings/_advanced.html.haml:36 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
app/views/layouts/nav/_breadcrumbs.html.haml:24 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
app/views/notify/new_review_email.html.haml:1 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
app/views/profiles/gpg_keys/_key.html.haml:21 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
app/views/profiles/gpg_keys/index.html.haml:15 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
app/views/profiles/gpg_keys/index.html.haml:19 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
app/views/profiles/keys/index.html.haml:22 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
app/views/shared/projects/_project.html.haml:27 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
ee/app/views/groups/epics/_epic.html.haml:29 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
ee/app/views/projects/security/policies/show.html.haml:5 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
ee/app/views/projects/services/gitlab_slack_application/_slack_button.html.haml:2 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
ee/app/views/shared/_label_row_epics_link.html.haml:6 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.
ee/app/views/shared/promotions/_promote_issue_weights.html.haml:17 [W] RuboCop: Layout/SpaceAfterColon: Space missing after colon.

Part of #23855