fix(example): Update RainMaker examples to work with ESP32C6

[P-R-O-C-H-Y]

Description of Change

This PR updates the RainMaker examples to work with ESP32C6.
Also enabled C6 in the CI for the RM examples.

Tests scenarios

Related links

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Generated by 🚫 dangerJS against 3c6d9a8

[github-actions]

Test Results

 56 files   56 suites   5m 22s ⏱️
 21 tests  21 ✅ 0 💤 0 ❌
135 runs  135 ✅ 0 💤 0 ❌

Results for commit 3c6d9a8.

♻️ This comment has been updated with latest results.

[github-actions]

Memory usage test (comparing PR against master branch)

The table below shows the summary of memory usage change (decrease - increase) in bytes and percentage for each target.

Memory	FLASH [bytes]		FLASH [%]		RAM [bytes]		RAM [%]
Target	DEC	INC	DEC	INC	DEC	INC	DEC	INC
ESP32S3	0	‼️ +3K	0.00	⚠️ +0.14	0	⚠️ +168	0.00	⚠️ +0.25
ESP32S2	0	⚠️ +1676	0.00	⚠️ +0.13	0	⚠️ +160	0.00	⚠️ +0.39
ESP32C3	0	‼️ +3K	0.00	⚠️ +0.15	0	⚠️ +168	0.00	⚠️ +0.28
ESP32C6	0	0	0.00	0.00	0	0	0.00	0.00
ESP32	0	⚠️ +1836	0.00	⚠️ +0.09	0	⚠️ +160	0.00	⚠️ +0.25

Click to expand the detailed deltas report [usage change in BYTES]

Target	ESP32S3		ESP32S2		ESP32C3		ESP32C6		ESP32
Example	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM
RainMaker/examples/RMakerCustom	‼️ +2K	⚠️ +168	⚠️ +1312	⚠️ +160	‼️ +3K	0	-	-	⚠️ +1484	⚠️ +160
RainMaker/examples/RMakerCustomAirCooler	‼️ +2K	⚠️ +168	⚠️ +1324	⚠️ +160	‼️ +3K	0	-	-	⚠️ +1360	⚠️ +160
RainMaker/examples/RMakerSonoffDualR3	‼️ +2K	⚠️ +168	⚠️ +1328	⚠️ +160	‼️ +3K	0	-	-	⚠️ +1356	⚠️ +160
RainMaker/examples/RMakerSwitch	‼️ +3K	⚠️ +168	⚠️ +1676	⚠️ +160	‼️ +3K	⚠️ +168	-	-	⚠️ +1836	⚠️ +160