[PropertyAccess] added moves to pluralMap
merged branch ianfp/ticket_8529 (PR #8531)

This PR was merged into the 2.2 branch.

Discussion
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[PropertyAccess] added moves to pluralMap

Fixes https://github.com/symfony/symfony/issues/8529

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8529
| License       | MIT
| Doc PR        | none

Commits
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d6cafcd [PropertyAccess] added moves to pluralMap