Bidder Configuration Fixes & URL Validation

[AntoxaAntoxic]

🔧 Type of changes

• [ ] new bid adapter
• [x] bid adapter update
• [ ] new feature
• [ ] new analytics adapter
• [ ] new module
• [ ] module update
• [ ] bugfix
• [ ] documentation
• [ ] configuration
• [ ] dependency update
• [ ] tech debt (test coverage, refactorings, etc.)

✨ What's the context?

• OMS, EMX Digital, IX, Adkernel and AudienceNetwork bidders require changes in their configuration due to lacking macros in their endpoints.
• migrating from org.apache.httpcomponents.httpclient to org.apache.httpcomponents.client5.httpclient5
• enhancing URL validation for bidder and any other endpoints

🧠 Rationale behind the change

Why did you choose to make these changes? Were there any trade-offs you had to consider?

🔎 New Bid Adapter Checklist

• [ ] verify email contact works
• [ ] NO fully dynamic hostnames
• [ ] geographic host parameters are NOT required
• [ ] direct use of HTTP is prohibited - implement an existing Bidder interface that will do all the job
• [ ] if the ORTB is just forwarded to the endpoint, use the generic adapter - define the new adapter as the alias of the generic adapter
• [ ] cover an adapter configuration with an integration test

🧪 Test plan

How do you know the changes are safe to ship to production?

🏎 Quality check

• [ ] Are your changes following our code style guidelines?
• [ ] Are there any breaking changes in your code?
• [ ] Does your test coverage exceed 90%?
• [ ] Are there any erroneous console logs, debuggers or leftover code in your changes?

[osulzhenko]

@AntoxaAntoxic pls resolve a conflict