RDCIST-3853: Add support to private gateway #4

Job	Run time
checks / pre-commit	43s
checks / readme-snippets	10s
checks / test (3.10, lowest-direct, windows-latest)	1m 54s
checks / test (3.10, lowest-direct, ubuntu-latest)	37s
checks / test (3.10, highest, ubuntu-latest)	42s
checks / test (3.11, highest, ubuntu-latest)	39s
checks / test (3.11, lowest-direct, windows-latest)	2m 37s
checks / test (3.12, lowest-direct, ubuntu-latest)	45s
checks / test (3.12, lowest-direct, windows-latest)	3m 22s
checks / test (3.11, lowest-direct, ubuntu-latest)	41s
checks / test (3.10, highest, windows-latest)	3m 10s
checks / test (3.11, highest, windows-latest)	2m 6s
checks / test (3.13, highest, windows-latest)	2m 34s
checks / test (3.12, highest, windows-latest)	3m 6s
checks / test (3.12, highest, ubuntu-latest)	43s
checks / test (3.13, lowest-direct, ubuntu-latest)	37s
checks / test (3.13, lowest-direct, windows-latest)	2m 11s
checks / test (3.13, highest, ubuntu-latest)	39s
	27m 16s

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