stm32f207 fails executing the tests/drivers/rtc/rtc_api

[FRASTM]

Describe the bug
Executing the tests/drivers/rtc/rtc_api on the nucleo_f207zg target fails

To Reproduce
Steps to reproduce the behavior:

1. west build -p auto -b nucleo_f207zg tests/drivers/rtc/rtc_api
2. set CONFIG_RTC_ALARM=n or CONFIG_RTC_ALARM=y as well
3. west flash
4. See error

Expected behavior

SUITE PASS - 100.00% [rtc_api]: pass = 2, fail = 0, skip = 1, total = 3 duration = 4.005 seconds                                              
 - PASS - [rtc_api.test_set_get_time] duration = 0.001 seconds                                                                                
 - PASS - [rtc_api.test_time_counting] duration = 4.001 seconds                                                                               
 - SKIP - [rtc_api.test_y2k] duration = 0.003 seconds                                                                                         

Impact
Testcase failure

Logs and console output

Running TESTSUITE rtc_api                                                                                                                     
===================================================================                                                                           
START - test_set_get_time                                                                                                                     
                                                                                                                                              
    Assertion failed at WEST_TOPDIR/zephyr/tests/drivers/rtc/rtc_api/src/test_time.c:65: rtc_api_test_set_get_time: ((timer_get >= RTC_TEST_G)
Got unexpected time                                                                                                                           
 FAIL - test_set_get_time in 0.023 seconds                                                                                                    
===================================================================                                                                           
START - test_time_counting                                                                                                                    
                                                                                                                                              
    Assertion failed at WEST_TOPDIR/zephyr/tests/drivers/rtc/rtc_api/src/test_time_incrementing.c:41: rtc_api_test_time_counting: (timer_get_)
Time is decrementing                                                                                                                          
 FAIL - test_time_counting in 0.017 seconds                                                                                                   
===================================================================    

Environment (please complete the following information):

• OS: (e.g. Linux, MacOS, Windows) Ubuntu
• Toolchain (e.g Zephyr SDK, ...) 0.16.3
• Commit SHA d6d3c10

[FRASTM]

With DBG log:

Running TESTSUITE rtc_api                                                                                                                     
===================================================================                                                                           
START - test_set_get_time                                                                                                                     
D: Setting clock                                                                                                                              
D: Calendar set : 31/12/25 - 23h60m9s                                                                                                         
D: Calendar get : 31/11/25 - 17h41m37s                                                                                                    
                                                                                                                                              
    Assertion failed at WEST_TOPDIR/zephyr/tests/drivers/rtc/rtc_api/src/test_time.c:65: rtc_api_test_set_get_time: ((timer_get >= RTC_TEST_G)
Got unexpected time                                                                                                                           
 FAIL - test_set_get_time in 0.032 seconds                                                                                                    
===================================================================                                                                           
START - test_time_counting                                                                                                                    
D: Setting clock                                                                                                                              
D: Calendar set : 31/12/25 - 23h59m55s                                                                                                        
D: Calendar get : 31/11/25 - 17h41m37s                                                                                                    
                                                                                                                                              
    Assertion failed at WEST_TOPDIR/zephyr/tests/drivers/rtc/rtc_api/src/test_time_incrementing.c:41: rtc_api_test_time_counting: (timer_get_)
Time is decrementing                                                                                                                          
 FAIL - test_time_counting in 0.026 seconds