[Epic] ANCM Improvements

[analogrelay]

There are a number of improvements we want to make to ANCM in-proc in 3.0 that relate to improved integration with the .NET Core host and Azure App Service.

Child Items:

• ANCM In process: Managed exceptions before full initialization are too hard to look at #5153 ANCM In process: Managed exceptions before full initialization are too hard to look at
• React to semver v2 support change in core-setup #8001 React to semver v2 support change in core-setup
• Change runtime SiteExtension to replace AspNetCoreModuleV2 definition #7307 Change runtime SiteExtension to replace AspNetCoreModuleV2 definition
• Do not CaptureStartupErrors when running in IIS #9667 Do not capture startup errors in Hosting when running in IIS
• React to hostfxr locating logic #8838 React to hostfxr locating logic Cut from 3.0
• [ANCM] [in proc] Write pre-main errors to the browser when running in development #10011 [ANCM] [in proc] Write pre-main errors to the browser when running in development
• Increase stack size for host when running in IIS In-Proc #9394 Increase stack size for host when running in IIS In-Proc
• Use runtime property settings instead of environment variables for setting startup hook #9520 Use runtime property settings instead of environment variables for setting startup hook
• [ANCM] [out of process] Write stdout to EventLog when exit code is non-zero #10005 [ANCM] [out of process] Write stdout to EventLog when exit code is non-zero
• [ANCM In-proc] Improve handling of malformed warmup requests #9873 [ANCM In-proc] Improve handling of malformed warmup requests
• Create new IIS sub-status code handler load failure #10008 Create new IIS sub-status code handler load failure

Tracking issues/PRs in coreclr/core-setup

• https://github.com/dotnet/coreclr/issues/23343 Need this for ANCM In process: Managed exceptions before full initialization are too hard to look at #5153
• Extend WindowsEventLog test for EntryPointFilter coreclr#23178 Need this for ANCM In process: Managed exceptions before full initialization are too hard to look at #5153 to set environment variables for IIS

[analogrelay]

@jkotalik to review and see if there's anything related to .NET Core host integration that isn't covered here.

[shirhatti]

EDIT: Added #9667 as a child item