…ET.Sdk

In order to consume the latest builds from dotnet/sdk/release/8.0.4xx,
we need to start using a new Maestro dependency name & new Git repo.

After the rename, I ran:

    > darc update-dependencies --id 235137
    Looking up build with BAR id 235137
    Updating 'Microsoft.NET.Sdk': '8.0.205-servicing.24212.27' => '8.0.402-servicing.24415.36' (from build '20240815.36' of 'https://github.com/dotnet/sdk')
    Checking for coherency updates...
    Using 'Strict' coherency mode. If this fails, a second attempt utilizing 'Legacy' Coherency mode will be made.
    Local dependencies updated based on build with BAR id 235137 (20240815.36 from https://github.com/dotnet/sdk@release/8.0.4xx)

With this change in place, the Maestro bot should be able to update
this from now on.

> darc get-build --repo dotnet/sdk --commit 99f2c9a2c651b8134152d1432cfe4a048c6af548
Repository:    https://github.com/dotnet/sdk
Branch:        release/8.0.4xx
Commit:        99f2c9a2c651b8134152d1432cfe4a048c6af548
Build Number:  20240905.6
Date Produced: 9/5/2024 1:31 PM
Build Link:    https://dev.azure.com/dnceng/internal/_build/results?buildId=2531815
AzDO Build Id: 2531815
BAR Build Id:  237662
Released:      False
Channels:
- .NET 8.0.4xx SDK
> darc update-dependencies --id 237662
Looking up build with BAR id 237662
Updating 'Microsoft.NET.Sdk': '8.0.402-servicing.24415.36' => '8.0.403-servicing.24455.6' (from build '20240905.6' of 'https://github.com/dotnet/sdk')