[Perl/perl5] 802ca5: t: Convert indirect syntax in tests

[Elvin Aslanov via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 802ca532439479d0dcfe338370439cca826bd84a
      
https://github.com/Perl/perl5/commit/802ca532439479d0dcfe338370439cca826bd84a
  Author: Elvin Aslanov <rwp.prim...@gmail.com>
  Date:   2023-11-03 (Fri, 03 Nov 2023)

  Changed paths:
    M t/TEST
    M t/io/errnosig.t
    M t/io/msg.t
    M t/io/perlio.t
    M t/io/pipe.t
    M t/io/sem.t
    M t/io/semctl.t
    M t/io/shm.t
    M t/io/socket.t
    M t/io/socketpair.t
    M t/lib/commonsense.t
    M t/op/grent.t
    M t/op/quotemeta.t
    M t/perf/speed.t
    M t/perf/taint.t
    M t/re/anyof.t
    M t/re/fold_grind.pl
    M t/re/pat.t
    M t/re/speed.t
    M t/re/stclass_threads.t
    M t/re/subst.t
    M t/run/runenv.t
    M t/run/switchM.t
    M t/run/switches.t
    M t/uni/fold.t
    M t/uni/overload.t
    M t/win32/runenv.t

  Log Message:
  -----------
  t: Convert indirect syntax in tests

We have a lot of lines throughout
the distribution with this particular
indirect object notation.

This PR deals with the tests in `t/`
directory which includes core files only.

Convert:

```
require Config; import Config;
```

To:

```
require Config; Config->import;
```

`t/op/lc.t`: excluded due to file encoding
(Unicode/Latin-1) issues