[EGD-7031] Remove UT deps to the production image

Remove dependency to the production image by creating separate sysroot
for test assets alongside with a test image Test.img.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>

[BH-372] Turned i18n into separate library

Turned i18n module into separate library moving source files, test
files and creating separate CMakeLists.txt, fixed other modules
link targets, fixed paths and sorted some lists

[EGD-6918] Timestamp clean up

Removal of not needed methods
Addition of unit tests
Fixes according to newst design guidelines
Added new seprate interface cmake lib for time constants

[BH-393] Create separate math lib

Create separate math lib from Math.hpp file.

Merge branch 'master' into stable

[BH-353] Add Documentation for main targets

* clean up mimimu required cmake version
* fixes for release workflow

Add documentation for targets, fixes for cmake
and release workflow.

[BH-367] Convert UCS2 to library

Convert UCS2 to library,
move tests from module-utils/test to UCS2 folder

Merge branch 'master' into stable

[BH-376] Utils time turned to separate library

Turned module-utils/time folder content into separate library,
cleaned up CMake libs dependencies, fixed include paths

[BH-370] Convert utils common_data into a libs

Create clipboard and eventsore libs

[BH-369] Turned UTF8 into separate library

Moved utf8 files, formed separate library, fixed include paths,
added utf8 library as dependency to every other target that
uses it, clang-formated utf8 files, cleaned up tests cmake script,
moved utf8 unit test

[BH-378] PR changes

PR changes - mainly includes

[BH-378] Utils move log to library

Moved log to separate library

[BH-353] Add minimal build target for BH

Introducing changes required for adding BellHybird target without
removing PurePhone.
Adden new targets:
* Pure (builds PurePhone and PurePhone.img)
* Bell (builds BellHybird and BellHybird.img)
* [PurePhone|BellHybrid]-[UpdatePackage|StandaloneImage)

Merge branch 'master' into stable

[EGD-6877] Fixed failing i18n tests

Fixed failing i18n tests caused by change in
setDisplayLanguage return value.

[EGD-5171] Utils to string fix

Fixed utils to string function to work with 8 bit integers.
Also nodiscard attribute added there.

[EGD-6527] Internationalization API unification

Single api to rule i18n
all calls to localistaion in cpp files unified
cut off ass many dependencies in i18n header as possible

[EGD-3649] Fix paths in UT

Reorganization of assets left path in UT outdated.

[EGD-5567] Add code coverage reporting

Add HTML and XML code coverage report generation with gcovr.

Cleanup unittests list - add missing googletest-gui to the unittests
list; remove dead functional tests.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>