Make the cmake.fetch_content.test fetch all dependencies

Author: dbarker

.github/workflows/ci.yml

@@ -56,7 +56,7 @@ jobs:
     runs-on: ubuntu-24.04
     env:
       CXX_STANDARD: '17'
-      BUILD_TYPE: 'Debug'
+      BUILD_TYPE: 'Release'
     steps:
     - name: Harden the runner (Audit all outbound calls)
       uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
@@ -69,11 +69,6 @@ jobs:
       run: |
         sudo -E ./ci/setup_ci_environment.sh
         sudo -E ./ci/setup_cmake.sh
-        sudo -E ./ci/setup_googletest.sh
-    - name: Install abseil, protobuf, and grpc with apt
-      run: |
-        sudo -E apt-get update
-        sudo -E apt-get install -y libabsl-dev libprotobuf-dev libgrpc++-dev protobuf-compiler protobuf-compiler-grpc
     - name: run fetch content cmake test
       run: |
         ./ci/do_ci.sh cmake.fetch_content.test
@@ -608,7 +603,6 @@ jobs:
     - name: Install Dependencies
       run: |
         sudo -E ./ci/install_abseil.sh
-        sudo -E ./ci/setup_googletest.sh
         sudo -E ./ci/install_protobuf.sh
         sudo -E ./ci/setup_grpc.sh -r $GRPC_VERSION -s $CXX_STANDARD -p protobuf -p abseil-cpp
     - name: run otlp exporter tests

install/test/cmake/fetch_content_test/CMakeLists.txt

@@ -8,8 +8,6 @@ cmake_minimum_required(VERSION 3.14)
 
 project(opentelemetry-cpp-fetch-content-test LANGUAGES CXX)
 
-find_package(GTest CONFIG REQUIRED)
-
 set(BUILD_TESTING
     ON
     CACHE BOOL "Build tests" FORCE)
@@ -27,8 +25,13 @@ message(
 )
 
 include(FetchContent)
+
+FetchContent_Declare(
+  googletest SOURCE_DIR ${OPENTELEMETRY_CPP_SRC_DIR}/third_party/googletest)
+
 FetchContent_Declare(opentelemetry-cpp SOURCE_DIR ${OPENTELEMETRY_CPP_SRC_DIR})
-FetchContent_MakeAvailable(opentelemetry-cpp)
+
+FetchContent_MakeAvailable(googletest opentelemetry-cpp)
 
 add_executable(
   fetch_content_src_test