[Locale] Adding a deprecation note about the Locale component
minor #12746 [Locale] Adding a deprecation note about the Locale component (rodrigobb)

This PR was squashed before being merged into the 2.7 branch (closes #12746).

Discussion
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[Locale] Adding a deprecation note about the Locale component

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12635
| License       | MIT
| Doc PR        | -

Commits
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5580a4f [Locale] Adding a deprecation note about the Locale component