tests: Fix the line endings for the SASL alt-auth tests

- Change data and protocol sections to CRLF line endings.

Prior to this change the tests would fail or hang, which is because
certain sections such as protocol require CRLF line endings.

Follow-up to a9499ff from today which added the tests.

Ref: https://github.com/curl/curl/pull/3790

tests/data/test848

@@ -17,13 +17,13 @@ REPLY AUTHENTICATE +
 REPLY c2hhcmVkLW1haWxib3gAdXNlcgBzZWNyZXQ= A002 OK AUTHENTICATE completed
 </servercmd>
 <data>
-From: me@somewhere
-To: fake@nowhere
-
-body
-
---
-  yours sincerely
+From: me@somewhere
+To: fake@nowhere
+
+body
+
+--
+  yours sincerely
 </data>
 </reply>
 
@@ -45,12 +45,12 @@ IMAP plain authentication with alternative authorization identity
 # Verify data after the test has been "shot"
 <verify>
 <protocol>
-A001 CAPABILITY
-A002 AUTHENTICATE PLAIN
-c2hhcmVkLW1haWxib3gAdXNlcgBzZWNyZXQ=
-A003 SELECT 848
-A004 FETCH 1 BODY[]
-A005 LOGOUT
+A001 CAPABILITY
+A002 AUTHENTICATE PLAIN
+c2hhcmVkLW1haWxib3gAdXNlcgBzZWNyZXQ=
+A003 SELECT 848
+A004 FETCH 1 BODY[]
+A005 LOGOUT
 </protocol>
 </verify>
 </testcase>