Revert "Remove c10 shim includes and redundant std type aliases"

[metascroy]

Reverts #20900

This causes many internal build failures in internal code like:

error: 'using executorch::aten::string_view = class std::basic_string_view<char>' is deprecated [-Werror=deprecated-declarations]
   82 |       ET_UNUSED std::string_view key) const override {

[pytorch-bot]

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As of commit 1a11aa0 with merge base 564e655 ():
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