Add definition of OPTIMIZE to .ph files, if optimizing is used

Rebuilt for IMA sigs, glibc 2.34, aarch64 flags

Rebuild to pick up new build flags from redhat-rpm-config (#1984652)

Added perl-autouse and perl-ExtUtils-MM-Utils to perl run-requires

Rebuilt for RHEL 9 BETA on Apr 15th 2021. Related: rhbz#1947937

Fix dumping a hash entry of PL_strtab type
Fix an arithmetic left shift of a minimal integer value (GH#18639)

Remove files excluded from dual-lived subpackages

Protect locale tests from LANGUAGE environment variable
Prevent the number of buckets in a hash from getting too large
Fix a memory leak when compiling a regular expression (GH#18604)

Make accessing environment by DynaLoader thread-safe
Use duplocale() if available
Fix fc() in Turkish locale
Fix croaking on "my $_" when "use utf8" is in effect (GH#18449)
Fix PERL_UNUSED_ARG() definition in XSUB.h
Add missing entries to perldiag (GH#18276)

Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild

5.32.1 bump (see <https://metacpan.org/pod/release/SHAY/perl-5.32.1/pod/perldelta.pod>