[utest] add float operators #4892

Job	Run time
RT-Thread Online Packages (STM32F407 RT-Spark)	6m 24s
RTduino/Arduino Libraries (STM32F412 Nucleo)	11m 13s
RTduino/Arduino Libraries (Raspberry Pico)	15m 1s
others_at32_hc32_ht32	6m 49s
stm32l4_f0_f1	14m 47s
stm32_f2_f4	10m 8s
stm32_f7_g0_h7_mp15_u5_h5_wb5	6m 39s
nxp_renesas	5m 25s
nuvoton	5m 36s
gd32_n32_apm32	5m 59s
Infineon_TI_microchip	7m 19s
mips	2m 47s
aarch64	4m 45s
riscv-none	3m 8s
riscv64-unknown	4m 2s
hpmicro	2m 36s
llvm-arm	5m 39s
simulator	3m 1s
ESP32C3	23m 4s
i386-unknown	2m 44s
nordic(yml)	10m 43s
	2h 37m 49s

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