fix: improve validation for custom benchmarks #1002

Job	Run time
Run JavaScript benchmark example	19s
Run Benchmark.Net .Net Benchmark Framework example	27s
Run linting and formatting check	20s
Run Criterion.rs benchmark example	21s
Run JMH Java Benchmark Framework example	26s
Run unit tests	27s
Run alert check with actions/cache	23s
Run Catch2 C++ Benchmark Framework example (v2.x)	19s
Run Catch2 C++ Benchmark Framework example (v3.x)	19s
Run Google C++ Benchmark Framework example	22s
Run Julia benchmark example	23s
Run Go benchmark example	31s
Run Rust benchmark example	18s
Run Pytest benchmark example	21s
	5m 16s

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