[interop] Avoid installing the same python dependencies twice in Go 1.64 tests (#36864)

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Avoid installing the same python dependencies twice due to duplication in template from https://github.com/grpc/grpc/pull/36755.

Redundant installation in the go1.x Dockerfile presently:
![image](https://github.com/grpc/grpc/assets/46515553/f8dafde9-5442-41b9-a429-dec93eee7c03)

Fixes: https://github.com/grpc/grpc/issues/36060

Closes #36864

PiperOrigin-RevId: 643048549
pull/36918/head
Arjan Singh Bal 6 months ago committed by Copybara-Service
parent d4b5e12f8e
commit a535a11efc
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