bevy_render: Do not remove VALIDATION_INDIRECT_CALL if Backends contains DX12 (#24129)

# Objective

- Fixes #24117

## Solution

- The flag is supposedly necessary for DX12 in wgpu. Add some additional
conditions for removing `VALIDATION_INDIRECT_CALL`, and add a comment
about it.

## Testing

- The revert commit in #24122 by itself fixes the issue in Pixel Eagle.
It was also confirmed to fix the issue by @meepleek — Thank you for
testing locally!
- The additional logic has not been verified in Pixel Eagle but it’s
simple enough to only need review.

(Just decided to remake the PR after main was force pushed)