OpenRewrite HttpRequestCustomRecipe Refactor

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Here's the task: HttpRequestCustomRecipe (located at sdk\tools\azure-openrewrite\src\main\java\com\azure\openrewrite\core\http\HttpRequestCustomRecipe.java) contains a method named getVisitor. This method has extensive logic and is difficult to follow logically. I want you to refactor the code into a more readable format, adding documentation moderately inline to describe the steps within the code and utilize helper methods to reduce code repetition when possible. Do not make any changes that would significantly impact the recipe performance or change the logical execution significantly.