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/test3003

@@ -33,23 +33,23 @@ smtp://%HOSTIP:%SMTPPORT/%TESTNUMBER --mail-rcpt-allowfails --mail-rcpt recipien
 #
 # Verify data after the test has been "shot"
 <verify>
-<protocol>
-EHLO %TESTNUMBER
-MAIL FROM:<sender@example.com>
-RCPT TO:<recipient.one@example.com>
-RCPT TO:<recipient.two@example.com>
-RCPT TO:<recipient.three@example.com>
-RCPT TO:<recipient.four@example.com>
-RCPT TO:<invalid.five>
-DATA
-QUIT
+<protocol crlf="yes">
+EHLO %TESTNUMBER
+MAIL FROM:<sender@example.com>
+RCPT TO:<recipient.one@example.com>
+RCPT TO:<recipient.two@example.com>
+RCPT TO:<recipient.three@example.com>
+RCPT TO:<recipient.four@example.com>
+RCPT TO:<invalid.five>
+DATA
+QUIT
 </protocol>
-<upload>
-From: different
-To: another
-
-body
-.
+<upload crlf="yes">
+From: different
+To: another
+
+body
+.
 </upload>
 </verify>
 </testcase>