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/test1704

@@ -47,15 +47,15 @@ http://%HOSTIP:%HTTPPORT/%TESTNUMBER --http2
 ^X-Forwarded-Proto:.*
 ^Via:.*
 </strip>
-<protocol>
-GET /%TESTNUMBER HTTP/1.1
-Host: %HOSTIP:%HTTPPORT
-User-Agent: curl/%VERSION
-Accept: */*
-Upgrade: h2c
-HTTP2-Settings: AAMAAABkAAQAAQAAAAIAAAAA
-Connection: Upgrade, HTTP2-Settings
-
+<protocol crlf="yes">
+GET /%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+User-Agent: curl/%VERSION
+Accept: */*
+Upgrade: h2c
+HTTP2-Settings: AAMAAABkAAQAAQAAAAIAAAAA
+Connection: Upgrade, HTTP2-Settings
+
 </protocol>
 
 # CURLE_WEIRD_SERVER_REPLY (8)