chore(bazel): align development-only dependencies (eclipse-score#175)

Co-authored-by: eclipse-score-bot <187756813+eclipse-score-bot@users.noreply.github.com>

Author: eclipse-score-bot

MODULE.bazel

@@ -91,7 +91,8 @@ bazel_dep(name = "score_devcontainer", version = "1.11.0", dev_dependency = True
 # S-CORE Toolchains (DO NOT MODIFY)
 #
 ###############################################################################
-bazel_dep(name = "score_bazel_cpp_toolchains", version = "1.0.3")
+bazel_dep(name = "score_bazel_cpp_toolchains", version = "1.0.3", dev_dependency = True)
+
 bazel_dep(name = "score_bazel_platforms", version = "1.1.0")
 
 # GCC Toolchains