[CI] Remove stale ascend entries from run_suite.py

[Godmook]

Motivation

PR #20751 moved all ascend tests from test/srt/ascend/ to test/registered/ascend/ but did not remove the old entries from suite_ascend in test/srt/run_suite.py. Since _sanity_check_suites() validates all suites globally before running any --suite, this breaks every non-ascend suite too (XPU, Xeon, etc.).

Example:

DEPRECATION NOTICE: The folder `test/srt` should be deprecated as soon as possible. Migrate tests to the new CI registry system described in `test/README.md`.
args=Namespace(timeout_per_file=1200, suite='per-commit-xpu', auto_partition_id=None, auto_partition_size=None, continue_on_error=False, enable_retry=False, max_attempts=2, retry_wait_seconds=60, retry_timeout_increase=600)
Traceback (most recent call last):
  File "/home/sdp/sglang/test/srt/run_suite.py", line 336, in <module>
    main()
  File "/home/sdp/sglang/test/srt/run_suite.py", line 276, in main
    _sanity_check_suites(suites)
  File "/home/sdp/sglang/test/srt/run_suite.py", line 196, in _sanity_check_suites
    len(nonexistent_files) == 0
AssertionError: Some test files in test suite do not exist on disk:
TestFile("ascend/test_ascend_autoround_dense.py"),
TestFile("ascend/test_ascend_autoround_moe.py"),
TestFile("ascend/test_ascend_compile_graph_tp1_bf16.py"),
TestFile("ascend/test_ascend_deepep.py"),
TestFile("ascend/test_ascend_gptq_moe.py"),
TestFile("ascend/test_ascend_graph_tp1_bf16.py"),
TestFile("ascend/test_ascend_graph_tp2_bf16.py"),
TestFile("ascend/test_ascend_hicache_mha.py"),
TestFile("ascend/test_ascend_hicache_mla.py"),
TestFile("ascend/test_ascend_mla_fia_w8a8int8.py"),
TestFile("ascend/test_ascend_mla_w8a8int8.py"),
TestFile("ascend/test_ascend_piecewise_graph_prefill.py"),
TestFile("ascend/test_ascend_sampling_backend.py"),
TestFile("ascend/test_ascend_tp1_bf16.py"),
TestFile("ascend/test_ascend_tp2_bf16.py"),
TestFile("ascend/test_ascend_tp2_fia_bf16.py"),
TestFile("ascend/test_ascend_tp4_bf16.py"),
TestFile("ascend/test_ascend_w4a4_quantization.py"),
TestFile("ascend/test_ascend_w8a8_quantization.py"),
TestFile("ascend/test_llada2_mini_ascend.py"),
Error: Process completed with exit code 1.

Modifications

• Removed 20 stale TestFile(...) entries from suite_ascend that reference files no longer on disk.
• Kept ascend/test_embed_interpolate_unittest.py which still exists under test/srt/ascend/.

Accuracy Tests

Speed Tests and Profiling

Checklist

• Format your code according to the Format code with pre-commit.
• Add unit tests according to the Run and add unit tests.
• Update documentation according to Write documentations.
• Provide accuracy and speed benchmark results according to Test the accuracy and Benchmark the speed.
• Follow the SGLang code style guidance.

Review and Merge Process

1. Ping Merge Oncalls to start the process. See the PR Merge Process.
2. Get approvals from CODEOWNERS and other reviewers.
3. Trigger CI tests with comments or contact authorized users to do so.
   • Common commands include /tag-and-rerun-ci, /tag-run-ci-label, /rerun-failed-ci
4. After green CI and required approvals, ask Merge Oncalls or people with Write permission to merge the PR.

[gemini-code-assist]

Warning

You have reached your daily quota limit. Please wait up to 24 hours and I will start processing your requests again!

[airMeng]

@huaiyuzh please take a look

[Godmook]

@airMeng I'll close both PRs. Thanks for helping to fix CIs. I'm so excited about that!

[Godmook]

#21978 @airMeng @huaiyuzh It has been fixed from this PR! :)