`JSON` config > pre-compiled all(?) regexes

[mmathieum]

Like with RouteColor.routeShortNameRegex in RouteConfig, pre-compile Regex regexes during class init.

Remove by lazy because:

Using by lazy introduces synchronization and object allocation overhead by creating a Lazy instance

Files:

• https://github.com/mtransitapps/parser/blob/master/src/main/java/org/mtransit/parser/config/gtfs/data/RouteConfig.kt
• https://github.com/mtransitapps/parser/blob/master/src/main/java/org/mtransit/parser/config/gtfs/data/AgencyConfig.kt