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/test976

@@ -72,21 +72,21 @@ HTTP with auth redirected to HTTP on a diff port --location-trusted
 #
 # Verify data after the test has been "shot"
 <verify>
-<protocol>
-GET http://firsthost.com/ HTTP/1.1
-Host: firsthost.com
-Authorization: Basic %b64[joe:secret]b64%
-User-Agent: curl/%VERSION
-Accept: */*
-Proxy-Connection: Keep-Alive
-
-GET http://firsthost.com:9999/a/path/%TESTNUMBER0002 HTTP/1.1
-Host: firsthost.com:9999
-Authorization: Basic %b64[joe:secret]b64%
-User-Agent: curl/%VERSION
-Accept: */*
-Proxy-Connection: Keep-Alive
-
+<protocol crlf="yes">
+GET http://firsthost.com/ HTTP/1.1
+Host: firsthost.com
+Authorization: Basic %b64[joe:secret]b64%
+User-Agent: curl/%VERSION
+Accept: */*
+Proxy-Connection: Keep-Alive
+
+GET http://firsthost.com:9999/a/path/%TESTNUMBER0002 HTTP/1.1
+Host: firsthost.com:9999
+Authorization: Basic %b64[joe:secret]b64%
+User-Agent: curl/%VERSION
+Accept: */*
+Proxy-Connection: Keep-Alive
+
 </protocol>
 </verify>
 </testcase>