Hosting: Make IHostingEnvironment.ApplicationMainUrl nullable#22558

AndyButland merged 3 commits into

v18/devumbraco/Umbraco-CMS:v18/devfrom

v18/bugfix/make-application-main-url-nullableumbraco/Umbraco-CMS:v18/bugfix/make-application-main-url-nullableCopy head branch name to clipboard