tests: replace remaining CR bytes with the new macro %CR

There is no more mixed-newline file in the repository after this patch.
Except for`.bat` and `.sln` files (4 in total), all files use LF
newlines.

Also:
- `spacecheck.pl`: drop mixed-EOL exception for test data.
- runtests: add option `-w` to check if test data has stray CR bytes in
  them.
- build: enable the option above in test targets, except the CI-specific
  one where `spacecheck.pl` does this job already.
- tested OK (with expected failures) in CI with stray CRs added.
- cmake: enable option `-a` for the `tests` target. To continue testing
  after a failed test.

Follow-up to 63e9721b63 #19313
Follow-up to 6cf3d7b1b1 #19318
Follow-up to 4d2a05d3fe #19284

Closes #19347

tests/data/test9

@@ -46,30 +46,30 @@ bar
 ^(Content-Type: multipart/form-data;|------------).*
 </strip>
 <protocol>
-POST /we/want/%TESTNUMBER HTTP/1.1
-Host: %HOSTIP:%HTTPPORT
-User-Agent: curl/%VERSION
-Accept: */*
-Content-Length: 431
-Content-Type: multipart/form-data; boundary=----------------------------9ef8d6205763
-
-------------------------------9ef8d6205763
-Content-Disposition: form-data; name="name"
-
-daniel
-------------------------------9ef8d6205763
-Content-Disposition: form-data; name="tool"
-
-curl
-------------------------------9ef8d6205763
-Content-Disposition: form-data; name="file"; filename="test9.txt"
-Content-Type: text/plain
-
+POST /we/want/%TESTNUMBER HTTP/1.1%CR
+Host: %HOSTIP:%HTTPPORT%CR
+User-Agent: curl/%VERSION%CR
+Accept: */*%CR
+Content-Length: 431%CR
+Content-Type: multipart/form-data; boundary=----------------------------9ef8d6205763%CR
+%CR
+------------------------------9ef8d6205763%CR
+Content-Disposition: form-data; name="name"%CR
+%CR
+daniel%CR
+------------------------------9ef8d6205763%CR
+Content-Disposition: form-data; name="tool"%CR
+%CR
+curl%CR
+------------------------------9ef8d6205763%CR
+Content-Disposition: form-data; name="file"; filename="test9.txt"%CR
+Content-Type: text/plain%CR
+%CR
 foo-
 This is a moo-
 bar
-
-------------------------------9ef8d6205763--
+%CR
+------------------------------9ef8d6205763--%CR
 </protocol>
 </verify>
 </testcase>