Move to Minimal Hosting Model in a backwards compatible way (#14656)

* Use minimal hosting model

* Make CoreRuntime backward compatible to the old hosting model

* Remove unneccessary methods from interface again

* Pushed the timeout for E2E test to 120 minutes instead of 60

* Updated the preview version from 6 to 7

* Explicitly call BootUmbracoAsync

* Add CreateUmbracoBuilder extension method

* Do not add IRuntime as hosted service when using WebApplication/WebApplicationBuilder

* Set StaticServiceProvider.Instance before booting

* Ensure Umbraco is booted and StaticServiceProvider.Instance is set before configuring middleware

* Do not enable static web assets on production environments

* Removed root namespace from viewImports

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Co-authored-by: Andreas Zerbst <andr317c@live.dk>
Co-authored-by: Ronald Barendse <ronald@barend.se>

build/azure-pipelines.yml

@@ -335,6 +335,7 @@ stages:
       # E2E Tests
       - job:
         displayName: E2E Tests
+        timeoutInMinutes: 120
         variables:
           Umbraco__CMS__Unattended__UnattendedUserName: Playwright Test
           Umbraco__CMS__Unattended__UnattendedUserPassword: UmbracoAcceptance123!