[icu] add host depedency (#16577)

[sthagen]

• [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

Describe the pull request

• What does your PR fix?

  Fixes #...

• Which triplets are supported/not supported? Have you updated the CI baseline?

  <all / linux, windows, ...>, <Yes/No>

• Does your PR follow the maintainer guide?

  Your answer

• If you have added/updated a port: Have you run ./vcpkg x-add-version --all and committed the result?

  <Yes / I am still working on this PR>

If you are still working on the PR, open it as a Draft: https://github.blog/2019-02-14-introducing-draft-pull-requests/