If a partition offset is not aligned to 4 kB, erase operations will
fail, even if they are aligned to 4 kB relative to the partition
start. This is because the underlying esp_flash_erase_range function
only works when the address is aligned to 4 kB.
Not making this an error for now, since applications might be using
read-only non-4kB aligned partitions, which still work fine.
Will change this behavior in IDF 5.0, requiring 4 kB alignment for all
partitions.
Closes https://github.com/espressif/esp-idf/issues/7295
Closes https://github.com/espressif/esp-idf/issues/7350
b56c9aafe4