fix(matter): serial print instead of log_i

[SuGlider]

Description of Change

The Matter Minimum Example has a Serial.print() when decommissioning but not Serial.begin().
The PR fixes this issue and also changes log_i() by Serial.print() in order to make it clearer for the users.

Tests scenarios

Minimum Matter Example here provided + ESP32-S3 and Alexa APP

Related links

None

[github-actions]

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[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	‼️ +12K	0.00	⚠️ +0.80	0	0	0.00	0.00
ESP32S2	0	‼️ +13K	0.00	⚠️ +0.83	0	⚠️ +16	0.00	⚠️ +0.02
ESP32C3	0	‼️ +14K	0.00	⚠️ +0.89	0	0	0.00	0.00
ESP32C6	0	‼️ +14K	0.00	⚠️ +0.93	0	0	0.00	0.00
ESP32	0	‼️ +13K	0.00	⚠️ +0.84	0	0	0.00	0.00

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
Matter/examples/MatterMinimum	‼️ +12K	0	‼️ +13K	⚠️ +16	‼️ +14K	0	‼️ +14K	0	‼️ +13K	0