Upgrade perl 5.38.2 → 5.40.4 (5.38 stream active support ended 2025-07)

[acortelyou]

Is your feature request related to a problem? Please describe.

perl (in SPECS/perl/perl.spec) is at 5.38.2 on the 5.38 release stream.

• 🟠 Active support for 5.38 ended 2025-07-03.
• ⚠️ Extended support for 5.38 ends 2026-07-02.
• Newer upstream releases: 2
• Latest upstream release: 5.42.2 (stream 5.42)
• Reference: https://endoflife.date/perl (checked 2026-04-22)

Describe the solution you'd like

Upgrade perl to 5.40.4.

Describe alternatives you've considered

• Stay on 5.38, assume security maintenance after EOL on 2026-07-02.
• Retire the perl package.

Additional context

Newer upstream releases:

Stream	LTS?	Latest release	Status	Active support ends	EOL
5.40		5.40.4	🟢 supported	—	2027-06-09
5.42		5.42.2	🟢 supported	—	2028-07-03