SITL: add ENABLED defines for remaining simulated I2C devices

[srmainwaring]

Adds conditional compilation defines for the remainder of the I2C sensors included in SIM_I2C.cpp.

Motivation

Aside from consistency, this reduces DRAM use for SIM on HW (esp. esp32empty and esp32s3empty where RAM limits are causing WiFi to not initialise correctly).

cd ./build/esp32s3empty/esp-idf_build
ninja -v -v size-files | grep SIM_I2C.cpp

Before:

Object File	DRAM .data	.bss	IRAM .text	RAM Total	Flash .text	.rodata	Flash Total
SIM_I2C.cpp.0.o	116	20620	0	20736	867	184	1167

After:

Object File	DRAM .data	.bss	IRAM .text	RAM Total	Flash .text	.rodata	Flash Total
SIM_I2C.cpp.0.o	36	3984	0	4020	71	24	131

See also:

• AP_HAL_ESP32: add targets to measure static memory sizes #28842

[peterbarker]

These should go in SIM_config.h

Also, please add underscores in each of them:

Suggested change

	#ifndef AP_SIM_AIRSPEEDDLVR_ENABLED
	#ifndef AP_SIM_AIRSPEED_DLVR_ENABLED