drivers: i2c_rtio: Use the NXP Flexcomm driver for interrupt handling

The Low Power Flexcomm driver manages the interrupt handling
and provides an API to register interrupt callbacks.
Register the NXP LPI2C interrupt handler.

Applying dca6e64c93f26db254089f20225854bb1f8fe9b4 on RTIO-version.

Authored-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>
Signed-off-by: Luis Ubieda <luisf@croxel.com>