Replace RMSNorm by nn.RMSNorm #2511

Job	Run time
test-advanced-any / linux-job	17m 42s
test-advanced-cpu / linux-job	17m 53s
test-evaluation-cpu / linux-job	17m 33s
test-evaluation-any / linux-job	17m 33s
test-gguf-any / linux-job	17m 30s
test-gguf-cpu / linux-job	17m 59s
test-multimodal-any / linux-job	4m 28s
test-multimodal-cpu / linux-job	4m 36s
test-native-any / linux-job	7m 11s
test-native-cpu / linux-job	7m 7s
test-quantization-any / linux-job	17m 55s
test-quantization-cpu / linux-job	17m 51s
test-readme-any / linux-job	12m 59s
test-readme-cpu / linux-job	11m 43s
	3h 10m 0s

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