run_all_benchmarks.sh script fails for asset-conversion-ops pallet

[re-gius]

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Description of bug

The run_all_benchmarks.sh script fails for the asset-conversion-ops pallet because it tries to create a weight file inside of a /frame/asset-conversion-ops/src/ folder which doesn't exist. The asset-conversion-ops pallet is defined inside of the /frame/asset-conversion/ops/src/ folder instead.
The reported error is Error: Input("Could not write weight file to: \"./frame/asset-conversion-ops/src/weights.rs\". Error: Os { code: 2, kind: NotFound, message: \"No such file or directory\" }").

The error comes from the implicit assumption in the script that every pallet with name <pallet_name> is defined inside the /frame/<pallet_name>/src/ folder.

Possible solution: handle the asset-conversion-ops pallet separately, overring the FOLDER variable with asset-conversion/ops. This would solve the issue, but it may be sensitive to possible future changes to the pallet.

Steps to reproduce

cd substrate
bash scripts/run_all_benchmarks.sh

[re-gius]

Solved in #5995