Mock same-named headers by directory

[mkarlesky]

Blocked on ThrowTheSwitch/Unity#854 and ThrowTheSwitch/CMock#540. This branch's submodules pin those unmerged PR commits. They move to the merged upstream commits before this PR leaves draft. Builds on #1325.

A test can name two same-named headers by directory but cannot mock both. CMock and Unity's runner name a mock by filename alone, so the two mocks share an include guard and lifecycle symbols. This affects traditional mocks and MOCK_PARTIAL_PUBLIC_MODULE_AT Partials alike. The upstream PRs add :mock_name_include_folder to both tools. This PR enables it and hands CMock the folder each mock's #include names.

Behavior

The new :cmock ↳ :mock_name_include_folder setting defaults to true in Ceedling and is mirrored into :test_runner, like :mock_prefix and :mock_suffix. A mock included as drivers/uart/mock_config.h gets the guard and lifecycle functions drivers_uart_mock_config. The runner calls those same names. A bare #include "mock_config.h" keeps its current name.

The folder is the #include as written, not the mock's mirrored location. The runner sees only the #include, so CMock must name from the same source. The two differ for a bare include of a header in a subdirectory, which header_include_path_validation_spec.rb covers.

Mock placement is unchanged when the folder ends the mirrored location. That holds for every Partial and for any #include that spells part of the real header's path. An #include spelling more path than the mirror holds places its mock below the per-test mock root at the written path, which the root search path still reaches. With the option set to false, CMock receives no folder and behaves exactly as before.

Changes

• lib/ceedling/test_invoker/test_invoker_types.rb, test_build_planner.rb: MockDetails gains include_path, the #include as the test wrote it.
• lib/ceedling/test_invoker/test_build_executor.rb: mock_folder_and_path derives CMock's folder and the mock's directory. stage_generate_mocks passes both to generate_mock.
• lib/ceedling/generators/generator.rb: generate_mock accepts folder:. It derives CMock's :mock_path by removing the folder from output_path and passes the folder to setup_mocks. Plugin hooks still receive the mock's own directory as :output_path.
• lib/ceedling/defaults.rb, lib/ceedling/config/configurator.rb: the default and its mirroring into :test_runner.
• Specs: unit coverage for the folder rule, the mirroring and the new MockDetails field. The Partial and traditional same-named mock examples are no longer pending.
• vendor/cmock, vendor/unity: pinned to the upstream PR commits.