refactor(ext_traits): simplify the signatures of some methods in `Encode` extension trait (#3687)
Files to modify:


**payments.rs**
  Modify existing code

**ext_traits.rs**
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**commands.rs**
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**webhooks.rs**
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**transformers.rs**
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**transformers.rs**
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**transformers.rs**
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**checkout.rs**
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**transformers.rs**
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**transformers.rs**
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**transformers.rs**
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**transformers.rs**
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**rapyd.rs**
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**transformers.rs**
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**admin.rs**
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**conditional_config.rs**
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**paypal.rs**
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**disputes.rs**
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**fraud_check_post.rs**
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**fraud_check_pre.rs**
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**mandate.rs**
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**cards.rs**
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**transformers.rs**
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**vault.rs**
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**payments.rs**
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**payment_complete_authorize.rs**
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**payment_confirm.rs**
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**payment_create.rs**
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**payment_response.rs**
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**payment_update.rs**
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**retry.rs**
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**types.rs**
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**routing.rs**
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**helpers.rs**
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**surcharge_decision_config.rs**
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**types.rs**
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**merchant_connector_account.rs**
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**refund.rs**
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**payment_methods.rs**
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**helpers.rs**
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**api.rs**
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**admin.rs**
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**payment_intent.rs**
  Modify existing code