Update test object factories to Test<Object>s naming convention

[Chu3laMan]

This PR addresses issue #16604 by renaming several WebAuthn test object classes to follow the established Spring Security convention of naming test objects as Test{Object}s (plural form).
Changes

Renamed TestAuthenticatorAttestationResponse → TestAuthenticatorAttestationResponses
Renamed TestCredentialRecord → TestCredentialRecords
Renamed TestPublicKeyCredential → TestPublicKeyCredentials
Renamed TestPublicKeyCredentialUserEntity → TestPublicKeyCredentialUserEntities
Renamed TestPublicKeyCredentialRpEntity → TestPublicKeyCredentialRpEntities

[jzheaux]

Thanks for the PR, @Chu3laMan! I addressed the formatting concerns in the PR in an additional commit. In order to merge, we'll need you to sign your commit and then update the PR accordingly. You should be able to do that as follows:

git rebase -i Update-WebAuthn-Test-Objects-Class-Names~2
// mark your commit as one to be edited
git commit -s --amend
git rebase --continue
git push origin +Update-WebAuthn-Test-Objects-Class-Names

[Chu3laMan]

Hi @jzheaux

It s done, thank you

[jzheaux]

@Chu3laMan, thanks for the PR. Note that I expanded the PR a bit so that now all classes follow the same convention.