Add tests for input dilation (LHS dilation / transposed convolution), kernel dilation (RHS dilation / atrous convolution), negative padding (cropping), and strided slicing in Mosaic TPU convolutions.
This is Part 2 of a 3-part changelist chain:
- Part 2 (this CL): Dilations (input/LHS and kernel/RHS) test
- Part 3 (follow-up CL): Grouped convolutions and property-based hypothesis testing.
PiperOrigin-RevId: 969761722