driver: i2s: correct the trigger_drain and trigger_stop commands

[francktheb]

The driver is updated to handle correctly the commands TRIGGER_DRAIN and TRIGGER_STOP. Moreover, the end of the rx_stream and tx_stream via DMA takes into account the state of IP i2s before disabling I2S IP.

[github-actions[bot]]

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[erwango]

Superseded by https://github.com/zephyrproject-rtos/zephyr/pull/72990