RDCIST-3853: Add support to private gateway #3680

Job	Run time
checks / pre-commit	23s
checks / readme-snippets	13s
checks / test (3.10, lowest-direct, ubuntu-latest)	38s
checks / test (3.10, highest, ubuntu-latest)	39s
checks / test (3.10, lowest-direct, windows-latest)	2m 9s
checks / test (3.11, lowest-direct, ubuntu-latest)	39s
checks / test (3.10, highest, windows-latest)	2m 19s
checks / test (3.12, lowest-direct, ubuntu-latest)	42s
checks / test (3.11, highest, ubuntu-latest)	38s
checks / test (3.11, lowest-direct, windows-latest)	2m 14s
checks / test (3.12, lowest-direct, windows-latest)	3m 19s
checks / test (3.12, highest, ubuntu-latest)	46s
checks / test (3.11, highest, windows-latest)	2m 11s
checks / test (3.12, highest, windows-latest)	3m 3s
checks / test (3.13, lowest-direct, ubuntu-latest)	36s
checks / test (3.13, lowest-direct, windows-latest)	2m 56s
checks / test (3.13, highest, ubuntu-latest)	39s
checks / test (3.13, highest, windows-latest)	2m 21s
	26m 25s

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