chore: tag v3.5.1 (#239)
Commits from v3.5.0 to v3.5.1
* Bug fix
1. (non-bug fix, the fix doesn't directly resolve the bug) [Fix] rpi_boot: call os.sync on all important files replacement #229
2. [Fix] cboot.is_switching_boot: only check ota_status and slot_in_use #231
3. [Fix] rpi_boot: clear leftover switching_boot_flag_file from previous interrupted OTA #233
4. (non-bug fix, the fix doesn't directly resolve the bug) [Fix] cboot: fix wrong usage of mark-boot-successful, add dump-slots-info logging #235
5. [Fix] boot_control: reboot subprocess call should also terminate otaclient process, refine common.OTAStatusFilesControl #234
6. [Fix] boot_control.grub: fix update_grub_default #238
* Refinement
1. [Refinement] create_standby: shuffle the calculated download_list #230
2. [Refinement] refine downloader and align its behavior as doc #228
3. [Refinement] refactor RetryTaskMap #232
4. [Refinement] otaproxy: remove cache scrubbing, instead only checking over cache db file #236
5. [Refinement] otaproxy: minor refinements and fixes #237
* Deps
1. [Refinement] otaproxy: minor refinements and fixes #237 : bump typing_extensions to 4.6.3.
