ppcp-api-client SettingsProvider migration (5598)

[puntope]

This PR replaces wcgateway.settings service with the new SettingsProvider in ppcp-api-client module.

PR Changes

Tweak ExperienceContextBuilder for using SettingsProvider

• get( 'brand_name') → SettingsProvider::brand_name
• get( 'landing_page') → SettingsProvider::landing_page
• get( 'payee_preferred') → SettingsProvider::instant_payments_only
• Tweak tests

Tweak IdentityToken for using SettingsProvider

• get( 'vault_enabled') → SettingsProvider::save_paypal_and_venmo
• get( 'vault_enabled_dcc') → SettingsProvider::save_card_details
• get( 'subscriptions_mode') → Copy SubscriptionSettingsMapHelper::mapped_value logic into $container->get( 'wc-subscriptions.subscription_mode' ) as this setting doesn't exist in the new settings. Then remove the Mapper when the refctor is completed ⚠️
• Tweak tests

Tweak OrderEndpoint removing wcgateway.settings usages

• get( 'intent' ) → SettingsProvider::authorize_only ( true 'AUTHORIZE' false: 'CAPTURE' ) ⚠️

Tweak PurchaseUnitSanitizer for using SettingsProvider

• get('subtotal_mismatch_behavior') → SettingsProvider::subtotal_adjustment
• get('subtotal_mismatch_line_name') -> removed. Using the default, as I didn't find the setting for this ⚠️
• Tweak tests

Tweak ClientCredentials for using SettingsProvider

• get( 'client_id' ) → SettingsProvider::merchant_data->client_id
• get( 'client_secret' ) → SettingsProvider::merchant_data->client_secret
• Tweak tests

Tweak PayPalBearer for using SettingsProvider

• get( 'client_id' ) → SettingsProvider::merchant_data->client_id
• get( 'client_secret' ) → SettingsProvider::merchant_data->client_secret
• Tweak tests

[github-actions]

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What's included:

• ✅ WordPress (latest)
• ✅ WooCommerce (latest)
• ✅ PayPal Payments plugin v3.3.0-pr3951-20268537613-g10b96cd (built from this PR)

Login credentials:

• Username: admin
• Password: password

Plugin Details:

• Version: 3.3.0-pr3951-20268537613-g10b96cd
• Commit: 10b96cd
• Artifact: woocommerce-paypal-payments-3.3.0-pr3951-20268537613-g10b96cd

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