[backport v4.1|v4.2] drivers: entropy: non-stop RNG ISR firing on STM32WB09

[etienne-lms]

Describe the bug

Upon a RNG error detection interrupt on STM32WB09xx SoCs, the interrupt status is never cleared and makes it firing forever.

P-R #98151 addresses the issue for Zephyr release v4.3 but the issue still applies on v4.1 and v4.2 where WB09xx RNG is supported supported. The P-R should be backported to fix this usses.

Regression

• This is a regression.

Steps to reproduce

No response

Relevant log output

Impact

Annoyance – Minor irritation; no significant impact on usability or functionality.

Environment

No response

Additional Context

No response

[mathieuchopstm]

See also: #98617 (failed backport issue) / #98618 (backport PR; could be cannibalized)