Cleanup/Refactor: remove manta/calamari/dolphin specifier from chain-spec files

[Garandor]

chain spec has the RT name mentioned in everythin, from constants to function names, e.g. dolphin_development_config
see

Manta/node/src/chain_specs/manta.rs

Line 40 in 7b421ba

pub fn manta_properties() -> Properties {

These are not needed since they are scoped to the file anyway and just create meaningless diffs between the files.
We should align them so rt-specific differences become immediately obvious by diffing the two chainspec files without getting added noise.
E.g. the snippet above should just be named properties instead of manta_properties