[CP-200] Delete file with old OS version

Removed update file after a successful update or
in case of an interrupted download.

[CP-200] Revert Delete file with old OS version

This reverts commit e6de85dbc19963e77144b192b9f40fbdc25a7e0d.

[CP-200] Delete file with old OS version

Removed update file after successful update

[CP-143] Set 204 code for responses with empty body

Body field was always added to response json, even if
it was containing only null. Now empty body is
not attached to response json, and status code
for such message is set to 204. Additionaly some
minor cleanup in service desktop was done.

Merge branch 'master' into stable

[BH-373] Convert utils json into a lib

Moving json to a third-party standalone library.

Merge branch 'master' into stable

[EGD-6701] System time usage fixes

Fixed all calls to stdlib time.
Removed all redundant calls to Timestamp treated as time source.

[BH-356] Move TPLIB (microtar) to separate directory

Move microtar to lib, amend CMAKE files

[BH-358] Add Move TPLIB (CRC32) to separate directory

Change directory location and update CMAKE

[EGD-6657] ApplicationDesktop clean-up

This PR cleans-up `ApplicationDesktop` after recent changes in
home screen notifications handling.

[EGD-6571] Fix error message

`std::filesystem::remove_all` function returns
number of files and directions removed.
Return value in `cleanupAfterUpdate` from this function
wasn't properly interpreted and returns an error even if shouldn't.

[EGD-6230] Fix reading of cheksum.txt file

Fix errors regarding update.

[EGD-6130] Fix update process (stack size, fscopy)

Increase stack size for service-desktop to 8192
Change fs syscall rename() to copy() (rename seems
to fail when moving data across different filesystems)

[EGD-5565] Fix update process on new lf filesystem

These changes are needed for update to work with new
LFS fileystem, also minor bugfixes are included.

[EGD-5970] Fix update unit tests

Unit test fixes for update process

[EGD-5771] Create post update info window

Add post update info window.

[EGD-5756] Add Update Window

Create Update Window(s) to control and visualize the MuditaOS update
process on Pure.

Merge branch 'EGD-5737-merge-master-to-exp-lbr-fix'

[EGD-5737] Fix compilation issues after merge

Master was using some fetures removed by new filesystem