tests: use crlf=yes attribute more

To make special newlines more explicit and visible.
Mostly in `<protocol>` sections, some in `<data*>` and `<upload>`.

Reducing the number of `tests/data/test*`:
- CRLF newlines from 21535 to 11337.
- files with mixed newlines from 1335 to 707.

Also delete empty `<protocol>` sections.

Closes #19284

tests/data/test941

@@ -42,27 +42,27 @@ smtp://%HOSTIP:%SMTPPORT/%TESTNUMBER --mail-rcpt recipient@example.com --mail-fr
 #
 # Verify data after the test has been "shot"
 <verify>
-<protocol>
-EHLO %TESTNUMBER
-MAIL FROM:<sender@example.com>
-RCPT TO:<recipient@example.com>
-DATA
-QUIT
+<protocol crlf="yes">
+EHLO %TESTNUMBER
+MAIL FROM:<sender@example.com>
+RCPT TO:<recipient@example.com>
+DATA
+QUIT
 </protocol>
-<upload>
-From: different
-To: another
-
-email
-headers and body
-with Unix newlines
-meant to be
-converted
-with
-the
---crlf option
-%repeat[650 x 0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789
%0a]%
-.
+<upload crlf="yes">
+From: different
+To: another
+
+email
+headers and body
+with Unix newlines
+meant to be
+converted
+with
+the
+--crlf option
+%repeat[650 x 0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789%0d%0a]%
+.
 </upload>
 </verify>
 </testcase>