* [icu] introduce host dependency

* add version files

* [icu] host dependency windows, update ci baseline

* add version files

* [icu] add debug messages

* [icu] do not depend on buildtree, install required files instead

* [icu] set env variable for dynamic libs

* [icu] find dlls for windows

* [icu] copy dlls

* [icu] cleanup, fix apple arm targets

* add version files

* [icu] no for-cross-compile subfolder

* add version files

* [icu] use  instead of

* add version files

* [icu] convert to vcpkg_configure_make

* [icu] also build on arm

* [icu] add DESTINATION param to vcpkg_copy_tools and use it

* [icu] use foreach in macOS build

* [icu] fix of copy tool dependencies on windows

* [icu] delete more folders on windows

* [icu] copy tool dependencies manually

* [icu] don't copy non existing pdb files

* add version files

* [icu] bring vcpkg_copy_pdbs() back

* add version files

* [icu] add comment

* add version files

* [icu] use BUILD_TRIPLET instead of VCPKG_MAKE_BUILD_TRIPLET

* add version files

* [icu] simply logic for build on mac

* add version files

* Trigger Build

* add version files

* Trigger Build

* Trigger Build

* Apply suggestions from code review

* Apply suggestions from code review

* Trigger Build

Co-authored-by: Billy Robert ONeal III <bion@microsoft.com>
Co-authored-by: nicole mazzuca <83086508+strega-nil-ms@users.noreply.github.com>

This change also includes a change to use the
Windows SDK as reported by the WinSDK ENV variable.
v8 9.0257.17 requires ICU to be version 68.x or up.

* [icu] Add support for macos rpath prefix macro

* update port_versions for icu

* address review comments

* update baseline

Co-authored-by: JackBoosY <yuzaiyang@beyondsoft.com>

This feature requires icu-le-hb which is not provided by vcpkg. When
this package is otherwise available on the system the build will fail as
the pkg-config file pulls the dependency from the system.

* [icu] Update automake dependency 1.15 -> 1.16 

automake 1.15 is not available through msys anymore; automake 1.16 is the oldest available version.

* [icu] Update CONTROL version

Co-authored-by: LilyWangL <wangli28@beyondsoft.com>

* [icu] Add tools

* Add macro variables