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/test2003

@@ -76,18 +76,18 @@ moo
 ^timeout = [5-6]$
 </strip>
 <protocol>
-GET /%TESTNUMBER0001 HTTP/1.1
-Host: %HOSTIP:%HTTPPORT
-User-Agent: curl/%VERSION
-Accept: */*
-
-USER anonymous
-PASS ftp@example.com
-PWD
-EPSV
-TYPE I
-SIZE %TESTNUMBER0002
-RETR %TESTNUMBER0002
+GET /%TESTNUMBER0001 HTTP/1.1%CR
+Host: %HOSTIP:%HTTPPORT%CR
+User-Agent: curl/%VERSION%CR
+Accept: */*%CR
+%CR
+USER anonymous%CR
+PASS ftp@example.com%CR
+PWD%CR
+EPSV%CR
+TYPE I%CR
+SIZE %TESTNUMBER0002%CR
+RETR %TESTNUMBER0002%CR
 opcode = 1
 mode = octet
 tsize = 0
@@ -98,15 +98,15 @@ mode = octet
 tsize = 0
 blksize = 512
 filename = /%TESTNUMBER0003
-EPSV
-SIZE %TESTNUMBER0002
-RETR %TESTNUMBER0002
-GET /%TESTNUMBER0001 HTTP/1.1
-Host: %HOSTIP:%HTTPPORT
-User-Agent: curl/%VERSION
-Accept: */*
-
-QUIT
+EPSV%CR
+SIZE %TESTNUMBER0002%CR
+RETR %TESTNUMBER0002%CR
+GET /%TESTNUMBER0001 HTTP/1.1%CR
+Host: %HOSTIP:%HTTPPORT%CR
+User-Agent: curl/%VERSION%CR
+Accept: */*%CR
+%CR
+QUIT%CR
 </protocol>
 <stdout>
 -foo-