ci(perf): add scalar FP32 workload suite

[xiaokamikami]

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[github-actions]

NEMU Performance Results - XS Interpreter

Test	Guest Instructions	Host Instructions	Estimated Host Throughput (instr/s)	Actual NEMU Throughput (instr/s)	Baseline Host Instructions	Baseline Actual NEMU Throughput (instr/s)	Change vs Baseline (Instructions)
bitmanip.bin	1.385e+05	5.747e+07	2.410e+07	1.591e+07	5.748e+07	2.665e+07	+0.00%
coremark-riscv64-xs-rv64gc-o2.bin	3.354e+06	1.946e+08	1.723e+08	1.577e+08	1.946e+08	1.157e+08	+0.00%
coremark-riscv64-xs-rv64gc-o3.bin	3.394e+06	1.940e+08	1.750e+08	1.678e+08	1.940e+08	1.606e+08	+0.00%
coremark-riscv64-xs-rv64gcb-o3.bin	3.035e+06	1.911e+08	1.588e+08	1.531e+08	1.911e+08	1.509e+08	-0.00%
amtest-riscv64-xs.bin	1.587e+04	8.830e+06	1.798e+07	1.869e+07	8.829e+06	1.625e+07	-0.00%
aliastest-riscv64-xs.bin	1.376e+03	7.732e+06	1.780e+06	3.292e+06	7.732e+06	2.693e+06	-0.00%
softprefetchtest-riscv64-xs.bin	2.643e+03	7.783e+06	3.396e+06	6.400e+06	7.786e+06	5.576e+06	+0.03%
zacas-riscv64-xs.bin	6.470e+04	1.266e+07	5.110e+07	2.035e+07	1.266e+07	1.334e+07	-0.00%
rvv-workload-suite	4.566e+04	1.112e+08	4.106e+06	5.744e+06	1.112e+08	4.535e+06	-0.00%
fp32-workload-suite	1.958e+03	6.130e+07	3.194e+05	9.551e+05	6.130e+07	7.104e+05	+0.00%
linux-hello	6.677e+07	1.690e+10	3.951e+07	4.755e+07	1.690e+10	4.739e+07	+0.01%

NEMU Performance Results - XS Ref Shared Object

Test	Guest Instructions	Host Instructions	Estimated Host Throughput (instr/s)	Actual NEMU Throughput (instr/s)	Baseline Host Instructions	Baseline Actual NEMU Throughput (instr/s)	Change vs Baseline (Instructions)
bitmanip.bin	1.385e+05	1.097e+09	1.262e+06	1.055e+06	1.097e+09	1.043e+06	-0.00%
coremark-riscv64-xs-rv64gc-o2.bin	3.354e+06	6.447e+09	5.203e+06	4.438e+06	6.447e+09	4.616e+06	-0.00%
coremark-riscv64-xs-rv64gc-o3.bin	3.394e+06	6.475e+09	5.242e+06	4.416e+06	6.475e+09	4.515e+06	-0.00%
coremark-riscv64-xs-rv64gcb-o3.bin	3.035e+06	6.090e+09	4.983e+06	4.281e+06	6.090e+09	4.237e+06	-0.00%
amtest-riscv64-xs.bin	1.588e+04	3.464e+07	4.583e+06	1.702e+06	3.464e+07	1.623e+06	-0.00%
aliastest-riscv64-xs.bin	1.379e+03	4.877e+06	2.828e+06	7.308e+05	4.877e+06	7.734e+05	+0.00%
softprefetchtest-riscv64-xs.bin	2.646e+03	6.987e+06	3.787e+06	1.111e+06	6.987e+06	1.225e+06	+0.00%
zacas-riscv64-xs.bin	6.471e+04	1.300e+08	4.979e+06	2.110e+06	1.300e+08	2.165e+06	-0.00%
rvv-workload-suite	4.568e+04	4.311e+08	1.060e+06	5.725e+05	4.311e+08	5.936e+05	-0.00%
fp32-workload-suite	1.982e+03	2.027e+07	9.779e+05	2.237e+05	2.027e+07	2.382e+05	-0.00%
linux-hello	7.522e+07	6.683e+11	1.125e+06	1.125e+06	6.683e+11	1.106e+06	-0.00%

• Host Instructions is measured by DynamoRIO's inscount client.
• Estimated Host Throughput assumes a fixed 4GHz CPU and IPC=2.5.
• Actual NEMU Throughput is a single native NEMU run and may vary with host CPU performance.
• Baseline columns are populated on pull_request runs when the PR base contains the same defconfig.
• Change vs Baseline (Instructions) is computed from host instruction count; positive means fewer host instructions than baseline.