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/test314

@@ -174,13 +174,13 @@ http://%HOSTIP:%HTTPPORT/%TESTNUMBER --compressed
 <strippart>
 s/^Accept-Encoding: [a-zA-Z, ]*/Accept-Encoding: xxx/
 </strippart>
-<protocol>
-GET /%TESTNUMBER HTTP/1.1
-Host: %HOSTIP:%HTTPPORT
-User-Agent: curl/%VERSION
-Accept: */*
-Accept-Encoding: xxx
-
+<protocol crlf="yes">
+GET /%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+User-Agent: curl/%VERSION
+Accept: */*
+Accept-Encoding: xxx
+
 </protocol>
 </verify>
 </testcase>