riscv64: wire TRSM, complex SYMV, and complex GEMM copy RVV kernels

[mengzhuo]

Wire existing RVV-optimized kernels into KERNEL.RISCV64_ZVL128B and KERNEL.RISCV64_ZVL256B that were already implemented but not referenced:

• TRSM (S/D/C/Z, all 4 directions): replace ../generic/trsm_kernel_.c with trsm_kernel__rvv_v1.c
• TRSM copy: add TRSMCOPY*M and ZTRSMCOPY*M variables using trsm*copy_rvv_v1.c and ztrsm*copy_rvv_v1.c
• Complex SYMV (C/Z): replace ../generic/zsymv_k.c with zsymv_*_rvv.c
• HEMV (C/Z): replace zhemv_vector.c with zhemv_rvv.c
• Complex GEMM copy (C/Z): replace ../generic/zgemm_ncopy/tcopy with zgemm_ncopy_rvv_v1.c / zgemm_tcopy_rvv_v1.c

Generic fallback counts: ZVL256B 56->28, ZVL128B 63->47

[codspeed-hq]

Merging this PR will improve performance by 17.64%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

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⚡ 14 improved benchmarks
✅ 48 untouched benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	test_daxpy[100-c]	25.3 µs	21.6 µs	+17.2%
⚡	test_daxpy[100-d]	24.3 µs	20.6 µs	+18.15%
⚡	test_nrm2[100-d]	37.7 µs	25.8 µs	+46.39%
⚡	test_daxpy[100-s]	24.2 µs	20.4 µs	+18.58%
⚡	test_nrm2[100-dz]	28.9 µs	25.3 µs	+14.22%
⚡	test_nrm2[1000-d]	30.6 µs	26.8 µs	+14.07%
⚡	test_daxpy[100-z]	26 µs	22.3 µs	+16.8%
⚡	test_nrm2[1000-dz]	35.5 µs	31.9 µs	+11.41%
⚡	test_daxpy[1000-c]	32.9 µs	29.2 µs	+12.75%
⚡	test_daxpy[1000-d]	32.6 µs	28.4 µs	+15.06%
⚡	test_daxpy[1000-s]	27.7 µs	24 µs	+15.52%
⚡	test_daxpy[1000-z]	40.7 µs	37 µs	+10.19%
⚡	test_dot[1000]	28.4 µs	24.5 µs	+15.99%
⚡	test_dot[100]	22.5 µs	18 µs	+24.57%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing mengzhuo:no_gen (7ad237f) with develop (3da0ff7)}

[martin-frbg]

Sorry, no - you cannot just wire up GEMM copy functions from a different target without regard for the blocking parameters as defined in param.h that the respective GEMM kernels use. Likewise, TRSM depends in part on the GEMM kernel so needs to be matched to it.
What would probably work from this PR is the SYMV/HEMV parts , and reusing ZGEMMONCOPY/ZGEMMOTCOPY from x280 for ZVL256B - but exactly the zgemm_ncopy_4_rvv/zgemm_tcopy_4_rvv that KERNEL.x280 has.
But it would still be a fairly pointless exercise without benchmark results showing a clear advantage