drivers: sensor: st: replace i2/3c_burst_write

i2/3c_burst_write comes with a warning where this combined write
synthesized by thsi API may not be supported by all I2/3C
devices. Replace with i2c_write instead with a buffer combining
the address and data.

The Kconfig STMEMSC_I2C_WRITE_BUFFER_SIZE was added to set the
size of the buffer pushed to the stack.

Signed-off-by: Ryan McClelland <ryanmcclelland@meta.com>