Add support to tasks stacks in RTC DRAM. Before this fix, any stack
in RTC DRAM would have been considered as corrupted, whichi is not
the case.
Fix a bug related to wrong parameters passed to esp_core_dump_get_stack.
Fix a bug reading fake stack memory, triggering a memory violation.
* Closes https://github.com/espressif/esp-idf/issues/6751
* Merges https://github.com/espressif/esp-idf/pull/6750