regex: check the platform name for longer than expected values #285

Job	Run time
Build and test on x86	35s
Build and test on x64	31s
Build and test on armv7	2m 17s
Build and test on aarch64	3m 55s
Build and test on s390x	2m 6s
Build and test on riscv32 with extensions	2m 17s
Build and test on riscv64 with extensions	3m 53s
Build and test on riscv64	3m 44s
Build and test on armt2	3m 42s
Build and test on riscv32	2m 4s
Build and test on loongarch64	4m 27s
	29m 31s

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