Add SSL mutual authentication support (#147)

* Fix import for I/O device only in case of mic (#146)

* conditional import for mic to suppress warnings

* Remove unused default_device_index variable

* Allow grpc options (#140)

* allow passing grpc channel create options

* add support for using client cert for MTLS

* rename ssl-cert to ssl-root-cert

* fix: renaming ssl_cert -> ssl_root_cert

* fix auth init and docstring

* fix missing typos

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Co-authored-by: yhayarannvidia <yhayaran@nvidia.com>
Co-authored-by: Viraj Karandikar <16838694+virajkarandikar@users.noreply.github.com>