Add source_output_file_map_aspect and DataStore symlink logic

[thiagohmcruz]

• Collect mapping information (from source code to respective .o file under bazel-out) to existing aspect implemented in BazelExtensions/xcode_configuration_provider.bzl
• Adds XCHammerAssets/bazel_build_service_setup.sh to setup many things necessary to setup the build service changes implemented here: Parse source to output file map from aspect outputgroup JSON files jerrymarino/xcbuildkit#49
• Adds bazel_build_service_config attr to allow one to configure the build service
• Load build service configurations in Xcode so the new pre build script introduced here can update the xcbuildkit config file on the fly
• Bump Tulsi to pick up latest fixes there (this, this)

[jerrymarino]

Overall LGTM besides minor edit to type / inline comment. I'd suggest to consider looking at the encapsulation of this logic into the other program but possibly as a followup since you have it working