Upgrade mysql 8.0.45 → 8.4.9 LTS (8.0 stream active support ended 2025-04)

[acortelyou]

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

mysql (in SPECS/mysql/mysql.spec) is at 8.0.45 on the 8.0 release stream.

• 🟠 Active support for 8.0 ended 2025-04-30.
• ⚠️ Extended support for 8.0 ends 2026-04-30.
• Newer upstream releases: 12
• Latest upstream release: 9.7.0 (stream 9.7)
• Reference: https://endoflife.date/mysql (checked 2026-04-22)

Describe the solution you'd like

Upgrade mysql to 8.4.9 (8.4 LTS).

Describe alternatives you've considered

• Stay on 8.0, assume security maintenance after EOL on 2026-04-30.
• Retire the mysql package.

Additional context

Newer upstream releases:

Stream	LTS?	Latest release	Status	Active support ends	EOL
8.1		8.1.0	🔴 EOL	2023-10-25	2023-10-25
8.2		8.2.0	🔴 EOL	2023-12-14	2023-12-14
8.3		8.3.0	🔴 EOL	2024-04-10	2024-04-10
8.4	⭐ LTS	8.4.9	🟢 supported	2029-04-30	2032-04-30
9.0		9.0.1	🔴 EOL	2024-10-15	2024-10-15
9.1		9.1.2	🔴 EOL	2025-01-21	2025-01-21
9.2		9.2.2	🔴 EOL	2025-04-15	2025-04-15
9.3		9.3.2	🔴 EOL	2025-07-22	2025-07-22
9.4		9.4.2	🔴 EOL	2025-10-21	2025-10-21
9.5		9.5.2	🔴 EOL	2026-01-20	2026-01-20
9.6		9.6.0	🔴 EOL	2026-04-21	2026-04-21
9.7		9.7.0	🟢 supported	—	—

Related work in this repo

• PR Upgrade mysql to 8.0.46 #16796 (Upgrade mysql to 8.0.46) stays within the EOAS 8.0 stream. 8.4 is the current supported LTS stream upstream.