[ios, macos] Logging. (#13235)
* [ios, macos] Update the logging subsystem to platform agnostic.
* [ios, macos] Add coordinate to string function.
* [ios, macos] Add BOOL to string function.
* [ios, macos] Add tracing logs.
* [ios, macos] Add tracing logs to generated style classes.
* [ios, macos] Split logging categories accordingly to MGLLoggingLevel.
* [ios, macos] Log network requests.
* [ios, macos] Migrate NSAssert to MGLAssert.
* [ios, macos] Include MGLLoggingConfiguration to filesource-files.txt.
* [ios, macos] Fix logger string specifier for the line parameter.
* [ios, macos] Add logs to shapes classes.
* [ios, macos] Add logs to offline classes.
* [ios, macos] Add logs to annotation classes.
* [ios, macos] Add logs to foundation classes.
* [ios, macos] Fix snapshotter size logging.
* [macos] Add logs to map view.
* [ios, macos] Fix string from boolean prefix, add custom function for NSCAssert.
* Log size test
* [ios, macos] Add logging conditional compilation flag.
* [ios, macos] Rename function NSStringFromMGLTransition to MGLStringFromMGLTransition.
* [ios, macos] Remove verbose logging for release builds.
* [ios, macos] Rename NSStringFromCLLocationCoordinate2D to MGLStringFromCLLocationCoordinate2D.
* [ios, macos] Clean unnecesary blank lines in MGLLight.mm set methods.
* [ios, macos] Fix logging grammar, format, function names.
* [ios, macos] Remove compilation flag, rename flags.
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