Improve Benchmarking CLI for Automation with Bot

[shawntabrizi]

Here are some identified problems to fix for end to end benchmarking automation with the bot:

• Keep the weight function signature consistent. It shouldnt be that someone runs the benchmarks, and that the function signature is inconsistent causing the branch to not compile. Constant Weight Signature in Benchmarking CLI #7233
• Substrate node weights should probably just reference the "default weights" since they are literally the same file. This means we dont need to maintain 2 sets of files. Use Handlebars Template for Benchmark CLI Output #7390
• We should probably get rid of impl WeightInfo for () in favor of impl WeightInfo for SubstrateDefault<T> or something, which would ensure that we are always using the DbWeight as defined in Runtime. Use Handlebars Template for Benchmark CLI Output #7390
• WeightInfo trait definition should live in the same file as the outputted weights, which means that if the signature DOES change, it will automatically be updated together with the new weights. User would still ultimately need to update the node. Use Handlebars Template for Benchmark CLI Output #7390
• Change default_weights.rs to just weights.rs when it has more things like the trait definition. Use Handlebars Template for Benchmark CLI Output #7390
• Create allow output to work for both the crate definition and the runtime definition. For example in the crate it will need to refer to crate::WeightInfo while in the runtime it needs to refer to pallet_name::WeightInfo. Use Handlebars Template for Benchmark CLI Output #7390

Additionally:

• Clean CLI command for getting list of pallets and benchmarks available.
• Auto add benchmark tests to tests.

[shawntabrizi]

Lots solved in #7390

[shawntabrizi]

opening a new issue for CLI