[Bug]: Cross Targeting Rebuild target is not extensible

### Issue Description

When rebuilding a project for multiple TFMs, the `RebuildDependsOn` property group is ignored and there is no way to extend the Rebuild process for each inner project since it ends up running `Clean;Build` for each of them. Also, there is not way to know those targets are executed in a Rebuild "context".

This makes rebuilds behave differently than for a single TFM, that can be extended through the `RebuildDependsOn`.
- Cross Targeting Rebuild: https://github.com/dotnet/msbuild/blob/c6e6cd447ac3944b351247d995f32b4d2010d409/src/Tasks/Microsoft.Common.CrossTargeting.targets#L163
- Single Target Rebuild: https://github.com/dotnet/msbuild/blob/c6e6cd447ac3944b351247d995f32b4d2010d409/src/Tasks/Microsoft.Common.CurrentVersion.targets#L979-L983

This is particularly problematic from Visual Studio, where the Rebuild project command of a project targeting multiple TFMs will always execute Rebuild for all of them by calling the Cross Targeting Rebuild target.

### Steps to Reproduce

1. Create a .NET project targeting multiple frameworks (i.e., MAUI or a console app targeting .NET 6 and 7)
2. Add an extra target to the `RebuildDependsOn` property group
3. Rebuild the project from Visual Studio or from .NET CLI without a specific target framework

### Expected Behavior

Your target should be executed.

If `RebuildDependsOn` is not available for the outer project, at least there should be a way to extend Rebuild in that scenario or a property that can signal that the Clean and Build targets are executed as part of a Rebuild.

### Actual Behavior

Your target is not executed

### Analysis

_No response_

### Versions & Configurations

_No response_