The BUILD_STATIC cmake config option forces the build system link
Tarantool binary statically with its dependencies. It expects that all
static libraries on which Tarantool binary depends are available at
build time.

We don't use this option directly to create static binaries because it
would produce different results on different build systems. Instead, we
use the separate cmake config located in the static-build directory,
which fetches all Tarantool dependencies from a predefined location
before building a static binary.

Having a separate cmake config is inconvenient. Let's enable bundling of
static binary dependencies right in the main project cmake config, like
we bundle, for example, libcurl. To achieve that, the new build option
was introduced BUILD_STATIC_WITH_BUNDLED_LIBS. It implies BUILD_STATIC
and also fetches and builds all required dependencies, like the
static-build cmake config used to. The latter doesn't do it anymore;
from now on, it just sets BUILD_STATIC_WITH_BUNDLED_LIBS when building
Tarantool. We can't remove the static-build cmake config yet because
there are quire a few CI workflows depending on it.

Note that, just like BUILD_STATIC, BUILD_STATIC_WITH_BUNDLED_LIBS
doesn't imply OPENSSL_USE_STATIC_LIBS so the latter should be set
explicitly if one wants to use the static openssl library. However,
setting OPENSSL_USE_STATIC_LIBS with BUILD_STATIC_WITH_BUNDLED_LIBS will
force the build system use bundled static openssl library.

This patch is relatively straightforward. It just moves the external
projects from /static-build/cmake/AddDependencyProjects.cmake to /cmake
adding build dependencies where required and setting variables that are
set by the corresponding /cmake/FindXXX.cmake configs.

There are a few things that should be noted separately though:
 - We dropped the ZLIB_FOUND check from the main project cmake config.
   It was used for building EE but the latter is going to be broken
   anyway once this patch is committed. We'll fix it in following
   commits.
 - FindLibUnwind referenced zlib library by ZLIB::ZLIB. We don't set
   it for bundled zlib so let's use ZLIB_LIBRARIES instead.
 - We don't need to detect dependency cflags while building bundled
   libraries as we can reuse the flags set by the main project.
 - We don't use HARDENING_LDFLAGS because it makes no sense when
   building static libraries.

Closes #9242

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