update TE test

[kshitij12345]

Change in #2268 leads to incorrect import and this was uncaught as Github CI doesn't run TE test.

Currently, we see this error

00:00:29 thunder/tests/test_transformer_engine_executor.py:15: in <module>
00:00:29     is_fp8_supported, msg_fp8 = te.fp8.check_fp8_support()
00:00:29 E   AttributeError: module 'transformer_engine' has no attribute 'fp8'

[nWEIdia]

is replacing te.fp8 with te.pytorch.fp8 better than skipping the tests?
update: I see te is "import transformer_engine.pytorch", so please ignore my question above.

[nWEIdia]

all te.fp8 would be "transformer_engine.pytorch.fp8",
but would te.sth_else be "transformer_engine.pytorch.sth_else", would this still be valid?

[kshitij12345]

Before #2268, the imports were

lightning-thunder/thunder/tests/test_transformer_engine_executor.py

Lines 8 to 11 in fda368a

	te = pytest.importorskip("transformer_engine", reason="transformer_engine was not found, skipping the tests.")
	from thunder.executors.transformer_engineex import transformer_engine_ex
	from transformer_engine.common import recipe
	import transformer_engine.pytorch as te

The test used to actually rely on import transformer_engine.pytorch as te

[t-vi]

Thank you @kshitij12345 @nWEIdia