Add the ability to set locale for top and bottom banner views

[kried]

Description

Closes #4581
https://mapbox.atlassian.net/browse/NAVIOS-1547

Implementation

Makes properties public

Usage example

let top = TopBannerViewController()
top.instructionsBannerView.distanceFormatter.locale = .init(identifier: "zh-Hans")
navigationOptions.topBanner = top

let bottom = BottomBannerViewController()
bottom.distanceFormatter.locale = .init(identifier: "zh-Hans")
bottom.dateFormatter.locale = .init(identifier: "zh-Hans")
navigationOptions.bottomBanner = bottom

let navigationViewController = NavigationViewController(for: indexedRouteResponse, navigationOptions: navigationOptions)
bottom.delegate = navigationViewController
top.delegate = navigationViewController

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fb0a314) 60.62% compared to head (86a2748) 60.30%.

@@            Coverage Diff             @@
##             main    #4595      +/-   ##
==========================================
- Coverage   60.62%   60.30%   -0.32%     
==========================================
  Files         189      189              
  Lines       21265    21058     -207     
==========================================
- Hits        12892    12700     -192     
+ Misses       8373     8358      -15     

Files	Coverage Δ
.../MapboxNavigation/BottomBannerViewController.swift	72.72% <100.00%> (-0.49%)	⬇️
...rces/MapboxNavigation/InstructionsBannerView.swift	80.73% <100.00%> (-0.13%)	⬇️
...ces/MapboxNavigation/TopBannerViewController.swift	24.28% <100.00%> (-1.36%)	⬇️

... and 63 files with indirect coverage changes