[SR-10502] Change `NSString.data(using:allowLossyConversion:)` parameter types to match ObjC

[compnerd]

Previous ID	SR-10502
Radar	None
Original Reporter	@compnerd
Type	Improvement

Additional Detail from JIRA

| | | |------------------|-----------------| |Votes | 0 | |Component/s | Foundation | |Labels | Improvement | |Assignee | None | |Priority | Medium | md5: 328542ae228bb8d4f36f48748abac01a

Issue Description:

NSString has the following method signature in ObjectiveC:
{{- (NSData *)dataUsingEncoding:(NSStringEncoding)encoding allowLossyConversion:(BOOL)lossy;}}

while it has the following signature in Swift:

func data(using encoding: UInt, allowLossyConversion lossy: Bool) -> Data?

We should change it to be:

func data(using encoding: String.Encoding, allowsLossyConversion lossy: Bool) -> Data?

[compnerd]

CC: @millenomi

[millenomi]

The docs have UInt too; whatever happened there, thanks for the feedback on this.