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/test669

@@ -41,23 +41,23 @@ http://%HOSTIP:%HTTPPORT/we/want/%TESTNUMBER -H 'Content-type: multipart/form-da
 s/^--------------------------[A-Za-z0-9]*/------------------------------/
 s/boundary=------------------------[A-Za-z0-9]*/boundary=----------------------------/
 </strippart>
-<protocol>
-POST /we/want/%TESTNUMBER HTTP/1.1
-Host: %HOSTIP:%HTTPPORT
-User-Agent: curl/%VERSION
-Accept: */*
-Content-Length: 260
-Content-Type: multipart/form-data; charset=utf-8; boundary=----------------------------
-
-------------------------------
-Content-Disposition: form-data; name="name"
-
-daniel
-------------------------------
-Content-Disposition: form-data; name="tool"
-
-curl
---------------------------------
+<protocol crlf="yes">
+POST /we/want/%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+User-Agent: curl/%VERSION
+Accept: */*
+Content-Length: 260
+Content-Type: multipart/form-data; charset=utf-8; boundary=----------------------------
+
+------------------------------
+Content-Disposition: form-data; name="name"
+
+daniel
+------------------------------
+Content-Disposition: form-data; name="tool"
+
+curl
+--------------------------------
 </protocol>
 </verify>
 </testcase>