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/test1015

@@ -38,14 +38,14 @@ content to _?!#$'|<>
 #
 # Verify data after the test has been "shot"
 <verify>
-<protocol nonewline="yes">
-POST /%TESTNUMBER HTTP/1.1
-Host: %HOSTIP:%HTTPPORT
-User-Agent: curl/%VERSION
-Accept: */*
-Content-Length: 119
-Content-Type: application/x-www-form-urlencoded
-
+<protocol crlf="yes" nonewline="yes">
+POST /%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+User-Agent: curl/%VERSION
+Accept: */*
+Content-Length: 119
+Content-Type: application/x-www-form-urlencoded
+
 my+name+is+moo%5B%5D&y e s=s_i_r&v_alue=content+to+_%3F%21%23%24%27%7C%3C%3E%0A&content+to+_%3F%21%23%24%27%7C%3C%3E%0A
 </protocol>
 </verify>