ci(vlm): raise Slurm wall time for MiniMax-M3 and Gemma4 recipes (#3448)

* ci(vlm): raise Slurm wall time for MiniMax-M3 and Gemma4 recipes

These five VLM recipes had no ci.time and were inheriting the cluster
default, which is too short for them and causes Slurm timeouts.

- minimax_m3_vl_sft_tulu3_text_cp8_16k: 01:00:00
- minimax_m3_vl_sft_cp2_medpix_2k: 01:00:00
- minimax_m3_vl_sft_ep32pp4: 00:20:00
- gemma4_31b_ffpa_mock_packing_cp8_16k: 00:20:00
- gemma4_26b_a4b_moe_medpix_ep8cp2_4k: 00:20:00

gemma4_26b_a4b_moe_medpix_ep8cp2_4k had no ci: section at all; it still
generates a release-scope job via vlm_finetune auto-discovery, so it gets
a minimal ci: block carrying the wall time.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Signed-off-by: Abhishree <abhishreetm@gmail.com>

* ci(vlm): set Slurm wall time for MiniMax-M3 VL LoRA 8-node recipe

minimax_m3_vl_lora_pp4ep8_8node had no ci.time and was inheriting the
cluster default, which is too short for an 8-node pp4/ep8 LoRA run.

- minimax_m3_vl_lora_pp4ep8_8node: 00:20:00

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Signed-off-by: Abhishree <abhishreetm@gmail.com>

---------

Signed-off-by: Abhishree <abhishreetm@gmail.com>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>