Update API type libs to support 59

[pwrightcertinia]

In addition to the update, investigate issues identified in apex-dev-tools/standard-types#20:

• [x] System.Label class may get masked by a dummy type, the static methods will be replicating or merging in.
• [x] Set now implements Iterable which may interfere with validations.
• [x] Iterate Within For Loops More Easily with Iterable: for each loop now supports Iterable types for a right hand side. The Set behaviour may also be involved here.