[TT-13998] make url of X-Tyk-Upstream optional when loadBalancing is present

[pvormste]

User description

TT-13998

Summary	[OAS Load balancer] upstream.URL is required when load balancer is enabled
Type	Bug
Status	In Dev
Points	N/A
Labels	-

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This PR makes upstream.url optional when upstream.loadBalancing[].targets.url is present.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Refactoring or add test (improvements in base code or adds test coverage to functionality)

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PR Type

Bug fix

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Description

• Made upstream.url optional when loadBalancing is present.

• Updated OAS schema to include oneOf validation for url or loadBalancing.

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Changes walkthrough 📝

	Relevant files
Bug fix	x-tyk-api-gateway.json Update OAS schema to validate `url` or `loadBalancing`      apidef/oas/schema/x-tyk-api-gateway.json Replaced required array with oneOf validation. Ensured either url or loadBalancing is required. Adjusted schema to align with new validation logic. +7/-2

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[buger]

Let's make that PR title a 💯 shall we? 💪

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Story Title	[OAS Load balancer] upstream.URL is required when load balancer is enabled
PR Title	[TT-13998] make url of X-Tyk-Upstream optional when loadBalancing is present

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[github-actions]

API Changes

no api changes detected

[github-actions]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Schema Validation Logic Ensure the oneOf validation for url or loadBalancing is correctly implemented and does not introduce unintended behavior or conflicts in the schema. "oneOf": [ { "required": ["url"] }, { "required": ["loadBalancing"] } ]

[github-actions]

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[sonarqubecloud]

Quality Gate failed

Failed conditions
E Security Rating on New Code (required ≥ A)

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