feat(zigbee): Save network channel after 1st joining for faster rejoin #3577

Job	Run time
Push event file	4s
Generate matrix	6s
Build (validation, esp32c3) / Build validation tests for esp32c3	3m 53s
Build (validation, esp32) / Build validation tests for esp32	4m 50s
Build (validation, esp32c6) / Build validation tests for esp32c6	4m 3s
Build (validation, esp32h2) / Build validation tests for esp32h2	3m 8s
Build (validation, esp32p4) / Build validation tests for esp32p4	3m 39s
Build (validation, esp32s2) / Build validation tests for esp32s2	4m 29s
Build (validation, esp32s3) / Build validation tests for esp32s3	6m 2s
QEMU	0s
Hardware	0s
	30m 14s

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