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Add support for implicit include directories to rule-based toolchains
Reorients the `cc_toolchain.cxx_builtin_include_directories` attribute so it is expressed as an attribute on `cc_args` and `cc_tool` to signify that the tools or arguments imply include directories that Bazel's include path checker should allowlist. This moves the allowlist to the source of truth that implies these directories.
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PiperOrigin-RevId: 671393376
Change-Id: Ide8cae548783726835168adcd3f705028a1f4308
Implement builtin CC toolchain features.
This will allow you to override builtin features
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PiperOrigin-RevId: 610887686
Change-Id: I30e928c116386ec703dff24a97f925481c395b06
