Certain URLs in api_url with Nvidia components throwing url format errors

[2-ulfhednar-2]

Describe the bug
When creating an Nvidia component with a custom link that isn't in the format http://localhost:8080/v1 or http://localhost:8080 you get:
ValueError: Base URL path is not recognized. Expected format is 'http://host:port'.

This error is also thrown if you use links similar to those specified in this cookbook
https://haystack.deepset.ai/cookbook/rag-with-nims
e.g. "http://nims.example.com/embedding"; "http://nims.example.com/embedding/v1"
or "http://nims.example.com/llm"; "http://nims.example.com/llm/v1"

It seeems to affect all components and is likely caused by the url_validation function called when initializing the components

To Reproduce
Create an Embedder or a Generator (other components likely affected too) with the api_urls specified in the following cookbook.
https://haystack.deepset.ai/cookbook/rag-with-nims

Describe your environment (please complete the following information):

• OS: Windows 11 and Ubuntu Linux tested
• Haystack version: 2.9.0
• Integration version: Nvidia-haystack 0.1.4

To fix maybe rework the URL_validation function to do the following things instead of how it is currently handled:

• Check if it's one of the known special Nvidia links
• Check the last 2 characters to see if it is ending with v1, and if it is not v1, add that to the URL, if it ends with v1, pass it through.