gve: defer interrupt enabling until NAPI registration

In the Linux kernel, the following vulnerability has been resolved:

gve: defer interrupt enabling until NAPI registration

Currently, interrupts are automatically enabled immediately upon

request. This allows interrupt to fire before the associated NAPI

context is fully initialized and cause failures like below:

[ 0.946369] Call Trace:

[ 0.946369] <IRQ>

[ 0.946369] __napi_poll+0x2a/0x1e0

[ 0.946369] net_rx_action+0x2f9/0x3f0

[ 0.946369] handle_softirqs+0xd6/0x2c0

[ 0.946369] ? handle_edge_irq+0xc1/0x1b0

[ 0.946369] __irq_exit_rcu+0xc3/0xe0

[ 0.946369] common_interrupt+0x81/0xa0

[ 0.946369] </IRQ>

[ 0.946369] <TASK>

[ 0.946369] asm_common_interrupt+0x22/0x40

[ 0.946369] RIP: 0010:pv_native_safe_halt+0xb/0x10

Use the `IRQF_NO_AUTOEN` flag when requesting interrupts to prevent auto

enablement and explicitly enable the interrupt in NAPI initialization

path (and disable it during NAPI teardown).

This ensures that interrupt lifecycle is strictly coupled with

readiness of NAPI context.