samples: subsys: setting does not apply when sector size is 128K

Exclude the stm32h7 target boards to this samples/subsys/settings
because it does not apply for flash sector flash size larger
than 64K : all those stm32h7 mcu have sector size of 128K
The settings_subsys_init will fails (-33 DOM errno ) when it checks
nvs_sector_size > UINT16_MAX in settings_backend_init()
of the subsys/settings/src/settings_nvs.c

Signed-off-by: Francois Ramu <francois.ramu@st.com>

samples/subsys/settings/README.rst

@@ -18,6 +18,7 @@ Requirements
 
 * A board with settings support, for instance: nrf52840dk/nrf52840
 * Or qemu_x86 target
+* A nvs_sector_size <= 0xFFFF
 
 Building and Running
 ********************

samples/subsys/settings/sample.yaml

@@ -7,6 +7,15 @@ tests:
     timeout: 20
     filter: dt_label_with_parent_compat_enabled("storage_partition", "fixed-partitions")
     platform_exclude:
+      - nucleo_h723zg
+      - stm32h735g_disco
+      - nucleo_h743zi
+      - stm32h745i_disco/stm32h745xx/m7
+      - nucleo_h745zi_q/stm32h745xx/m7
+      - stm32h747i_disco/stm32h747xx/m7
+      - stm32h750b_dk
+      - nucleo_h753zi
+      - nucleo_h755zi_q/stm32h755xx/m7
       - qemu_cortex_m0/nrf51822
     integration_platforms:
       - native_sim