[QNN] Disable 7 RMSNorm onnx backend tests (#26999)
With the RMSNorm registration from
https://github.com/microsoft/onnxruntime/pull/26853, the op tests are
enabled, and some of them are failing.
This pull request adds several new test cases to the list of broken
tests in the `GetBrokenTests` function. These additions help track
issues related to RMS normalization operations across different tensor
shapes and axis configurations.
Test coverage improvements:
* Added seven new RMS normalization test cases
(`rms_normalization_2d_axis1`, `rms_normalization_2d_axis_negative_1`,
`rms_normalization_3d_axis2_epsilon`,
`rms_normalization_3d_axis_negative_1_epsilon`,
`rms_normalization_4d_axis3`, `rms_normalization_4d_axis_negative_1`,
and `rms_normalization_default_axis`) to the broken tests set in
`TestCase.cc`.
