Add fallback to ensure basic functionality for XPU

[CuiYifeng]

This PR adds out-variant functions to the fallback list: cholesky.out, cholesky_inverse.out, geqrf.a, and ormqr.out, improving coverage for operations that produce output tensors.

[Copilot]

Pull Request Overview

This PR enhances XPU fallback coverage by adding out-variant and named-variant function signatures to the fallback list. These additions ensure that operations with output tensor parameters have proper fallback implementations when XPU-native implementations are unavailable.

Key changes:

• Added out-variant functions (cholesky.out, cholesky_inverse.out, ormqr.out) to complement their base function counterparts
• Added named variant geqrf.a to complement the base geqrf function

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[CuiYifeng]

The following test cases will be fixed:

TestCommonXPU,test_out_cholesky_xpu_float32
TestCommonXPU,test_out_warning_cholesky_inverse_xpu
TestCommonXPU,test_out_warning_cholesky_xpu
TestCommonXPU,test_out_warning_geqrf_xpu
TestCommonXPU,test_out_warning_ormqr_xpu