Revert "perf: benchmark improve sig GetMetadata" #4320
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Reverts #4223
Initially, we improved performance by statically defining the metadata of a signature. However, we later discovered a data race issue when a JSON library attempted to iterate over the properties of the detect.SignatureMetadata map while another goroutine was modifying the same object.
A possible future improvement would be to transform the metadata, which currently uses abstract types, into concrete types. This would allow us to statically define it without any issues.
The issues that arose after migrating the signature metadata to be static:
#4313
#4298