[6/n Update test rpc path (#62526)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/62380
* update `test_rpc` function to call wheel install folder {sitepackages}/torch instead of build/ folder
* add IN_WHEEL_TEST to limit the change for linux CI GHA only
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62526
Test Plan: check if all ci workflows pass
Reviewed By: walterddr, seemethere
Differential Revision: D30072994
Pulled By: tktrungna
fbshipit-source-id: 3217e764bd859dc2db597d24a1abb5ec1d0e8c9e
