Add `_retry_server_directed_only` mode for Retry-After header compliance #2812

Job	Run time
check-types (3.9)	55s
check-linting (3.9)	26s
check-types (3.12)	41s
check-linting (3.10)	26s
check-types (3.10)	42s
check-types (3.13)	33s
check-types (3.14)	50s
Unit Tests (Python 3.11, min deps)	3m 3s
check-linting (3.11)	23s
Unit Tests + PyArrow (Python 3.10, default deps)	3m 23s
Unit Tests (Python 3.10, min deps)	3m 9s
check-linting (3.14)	26s
Unit Tests (Python 3.9, min deps)	3m 5s
Unit Tests + PyArrow (Python 3.12, default deps)	3m 18s
check-linting (3.13)	26s
Unit Tests (Python 3.14, default deps)	2m 38s
check-linting (3.12)	27s
Unit Tests (Python 3.13, default deps)	2m 38s
Unit Tests + PyArrow (Python 3.9, default deps)	3m 28s
Unit Tests (Python 3.14, min deps)	2m 54s
Unit Tests + PyArrow (Python 3.14, default deps)	11m 31s
Unit Tests (Python 3.12, default deps)	2m 39s
Unit Tests + PyArrow (Python 3.11, min deps)	3m 30s
Unit Tests + PyArrow (Python 3.11, default deps)	3m 17s
Unit Tests (Python 3.9, default deps)	2m 47s
Unit Tests + PyArrow (Python 3.9, min deps)	3m 37s
check-types (3.11)	35s
Unit Tests (Python 3.11, default deps)	2m 36s
Unit Tests + PyArrow (Python 3.14, min deps)	11m 8s
Unit Tests + PyArrow (Python 3.13, default deps)	3m 20s
Unit Tests + PyArrow (Python 3.10, min deps)	3m 42s
Unit Tests (Python 3.10, default deps)	2m 41s
	1h 25m 14s

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