tests: rename tests scripts to the test number

It is hard to name the scripts sensibly. Lots of them are similarly
named and the name did not tell which test that used them.

The new approach is rather to name them based on the test number that
runs them. Also helps us see which scripts are for individual tests
rather than for general test infra.

 - badsymbols.pl -> test1167.pl
 - check-deprecated.pl -> test1222.pl
 - check-translatable-options.pl -> test1544.pl
 - disable-scan.pl -> test1165.pl
 - error-codes.pl -> test1175.pl
 - errorcodes.pl -> test1477.pl
 - extern-scan.pl -> test1135.pl
 - manpage-scan.pl -> test1139.pl
 - manpage-syntax.pl -> test1173.pl
 - markdown-uppercase.pl -> test1275.pl
 - mem-include-scan.pl -> test1132.pl
 - nroff-scan.pl -> test1140.pl
 - option-check.pl -> test1276.pl
 - options-scan.pl -> test971.pl
 - symbol-scan.pl -> test1119.pl
 - version-scan.pl -> test1177.pl

Closes #12487

tests/data/test1276

@@ -18,7 +18,7 @@ Verify lib/optiontable.pl
 </name>
 
 <command type="perl">
-%SRCDIR/option-check.pl %SRCDIR/..
+%SRCDIR/test1276.pl %SRCDIR/..
 </command>
 </client>