Fix ItemWithPath throwing on null/empty/whitespace path instead of generating malformed URLs#3072

Copilot wants to merge 2 commits intomainmicrosoftgraph/msgraph-sdk-dotnet:mainfrom

copilot/fix-sdk-url-construction-bugmicrosoftgraph/msgraph-sdk-dotnet:copilot/fix-sdk-url-construction-bugCopy head branch name to clipboard