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/test667

@@ -61,28 +61,28 @@ s/boundary=------------------------[A-Za-z0-9]*/boundary=-----------------------
 # Note that the stripping above removes 12 bytes from every occurrence of the
 # boundary string and since 5 of them are in the body contents, we see
 # (5*12) == 60 bytes less
-<protocol>
-POST /%TESTNUMBER HTTP/1.1
-Host: %HOSTIP:%HTTPPORT
-Accept: */*
-Transfer-Encoding: chunked
-Content-Type: multipart/form-data; boundary=----------------------------
-Expect: 100-continue
-
-85
-------------------------------
-Content-Disposition: form-data; name="field"
-Content-Transfer-Encoding: base64
-
-
-4
-ZHVt
-3a
-bXk=
---------------------------------
-
-0
-
+<protocol crlf="yes">
+POST /%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+Transfer-Encoding: chunked
+Content-Type: multipart/form-data; boundary=----------------------------
+Expect: 100-continue
+
+85
+------------------------------
+Content-Disposition: form-data; name="field"
+Content-Transfer-Encoding: base64
+
+
+4
+ZHVt
+3a
+bXk=
+--------------------------------
+
+0
+
 </protocol>
 </verify>
 </testcase>