fix(provider): use built-in translation when translation in ProConfigContext is missing

[Hector-Chong]

For example, if the user has not defined editableTable.onlyAddOneLine in the context:

// Intl passed to ProConfigProvider
export default {
  editableTable: {},
};

The translation will fall back to default message. However, editableTable.onlyAddOneLine is actually defined in the provider's default language set. This fix ensures that the translation is found in the default set.

[github-actions[bot]]

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