fix(dwc2): prevent restart during endpoint retirement

Mark active close and abort operations on both the endpoint and host channel before requesting a halt. Channel, RX FIFO, and Tx FIFO interrupt paths then discard work until Channel Halted retires the transfer, so split ACK/NYET handling cannot re-arm a channel that software is closing.

Serialize the state transition with GAHBCFG.GINT. This keeps a parked low-speed channel atomic with the one-transaction-per-frame SOF scheduler without freeing and reallocating the ESP32 interrupt handler. Slave mode temporarily restores controller interrupts while waiting for halt-request queue space; periodic DMA channels remain owned until their natural halt.