fix: change third_party structure and add boost dependency

Add boost dependency used by stochastic_library and change third_party structure to be able to load transitive dependencies of stochastic_library from OSC Engine.

engine/bazel/deps.bzl

-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
-
-ECLIPSE_GITLAB = "https://gitlab.eclipse.org/eclipse"
-
-MANTLE_API_TAG = "v8.0.0"
-STOCHASTICS_LIBRARY_TAG = "v0.10.0"
-UNITS_TAG = "2.3.3"
-YASE_TAG = "v0.0.1"
-
-def osc_engine_deps():
-    """Load dependencies"""
-    maybe(
-        http_archive,
-        name = "mantle_api",
-        url = ECLIPSE_GITLAB + "/openpass/mantle-api/-/archive/{tag}/mantle-api-{tag}.tar.gz".format(tag = MANTLE_API_TAG),
-        sha256 = "abb18f7180da012c02bda874752a7efd9ceab1da31e616174790f07a17c4fa3f",
-        strip_prefix = "mantle-api-{tag}".format(tag = MANTLE_API_TAG),
-    )
-
-    maybe(
-        http_archive,
-        name = "stochastics_library",
-        url = ECLIPSE_GITLAB + "/openpass/stochastics-library/-/archive/{tag}/stochastics-library-{tag}.tar.gz".format(tag = STOCHASTICS_LIBRARY_TAG),
-        sha256 = "0b9173d005e433cf9e5ad68d3fe28fdcff5ea1b511118a4a47bb95f225534a6f",
-        strip_prefix = "stochastics-library-{tag}".format(tag = STOCHASTICS_LIBRARY_TAG),
-    )
-
-    maybe(
-        http_archive,
-        name = "units_nhh",
-        url = "https://github.com/nholthaus/units/archive/refs/tags/v{tag}.tar.gz".format(tag = UNITS_TAG),
-        sha256 = "b1f3c1dd11afa2710a179563845ce79f13ebf0c8c090d6aa68465b18bd8bd5fc",
-        strip_prefix = "./units-{tag}".format(tag = UNITS_TAG),
-        build_file = "//bazel:units.BUILD",
-    )
-
-    maybe(
-        http_archive,
-        name = "yase",
-        url = ECLIPSE_GITLAB + "/openpass/yase/-/archive/{tag}/yase-{tag}.tar.gz".format(tag = YASE_TAG),
-        sha256 = "243d710172dff4c4e7ab95e5bd68a6d8335cf8a3fdd1efa87d118250e3b85ee3",
-        strip_prefix = "yase-{tag}".format(tag = YASE_TAG),
-    )
-
-    http_archive(
-        name = "open_scenario_parser",
-        build_file = "//bazel:openscenario_api.BUILD",
-        url = "https://github.com/RA-Consulting-GmbH/openscenario.api.test/releases/download/v1.4.0/OpenSCENARIO_API_LinuxSharedRelease_2024.11.18.tgz",
-        sha256 = "7a4cdb82ccaaeed5fccf12efd94cf4f9c9d3ac0fc7d7feedd4c0babe2404f853",
-        strip_prefix = "OpenSCENARIO_API_LinuxSharedRelease",
-    )