Add customization for dotnet ef migrations bundle project

### Bug description

When running `dotnet ef migrations bundle`, a temporary project is generated to produce the executable migration bundle. During this process, NuGet performs a restore operation, and it tries to fetch vulnerability metadata from `https://api.nuget.org/v3/vulnerabilities/index.json`.

In environments without internet access (e.g. CI/CD, Docker builds), this request times out and results in the following warning:

```
/tmp/tckne5lh.xnj/efbundle.csproj : warning NU1900: Error occurred while getting package vulnerability data: The HTTP request to 'GET https://api.nuget.org/v3/vulnerabilities/index.json' has timed out after 100000ms.
Restored /tmp/tckne5lh.xnj/efbundle.csproj (in 5.12 min).

/tmp/tckne5lh.xnj/efbundle.csproj : warning NU1900: Error occurred while getting package vulnerability data: The HTTP request to 'GET https://api.nuget.org/v3/vulnerabilities/index.json' has timed out after 100000ms.
```

I haven't found a single way to disable this check.

### Your code

```csharp
FROM dotnet/sdk:8.0 AS build

WORKDIR /app

COPY ./components/back .

WORKDIR /app/src/EfMigration.DAL

ENV DOTNET_NUGET_SIGNATURE_VERIFICATION=false

RUN dotnet new tool-manifest \
&& dotnet tool install dotnet-ef -v d \
&& dotnet ef migrations bundle -v

WORKDIR /app

RUN dotnet restore EfMigration.sln
RUN dotnet build EfMigration.sln -c Release -o /app/build
......
```

### Verbose output

```text
/tmp/0bx3beiz.nzr/efbundle.csproj : warning NU1900: Error occurred while getting package vulnerability data: The HTTP request to 'GET https://api.nuget.org/v3/vulnerabilities/index.json' has timed out after 100000ms.
Restored /tmp/0bx3beiz.nzr/efbundle.csproj (in 5.13 min).
Restored /app/src/EfMigration.DAL/EfMigration.DAL.csproj (in 98 ms).
/tmp/0bx3beiz.nzr/efbundle.csproj : warning NU1900: Error occurred while getting package vulnerability data: The HTTP request to 'GET https://api.nuget.org/v3/vulnerabilities/index.json' has timed out after 100000ms.
.....
```

### EF Core version

9.0.4

### Target framework

.NET 8.0