fix(tests): Fix GPIO and PeriMan tests

[lucasssvaz]

Description of Change

This pull request introduces improvements to resource management and reliability in the ESP I2S library and its related validation tests. The most important changes focus on preventing recursive calls and ensuring proper initialization and teardown of hardware interfaces, as well as refining test logic for I2C and GPIO peripherals.

I2S resource management improvements:

• Added _mode initialization to I2SClass to indicate when I2S is not started, and updated i2sDetachBus to only call end() if I2S was initialized, preventing unnecessary resource cleanup. [1] [2]
• Updated the end() method in I2SClass to prevent recursion by checking if already ended and resetting _mode before deinitializing pins, using the saved mode for cleanup logic. [1] [2]

Validation test reliability:

• In periman.ino, ensured Serial1 is always properly initialized and its callback set during both setup and teardown, even if previous tests terminated the interface. [1] [2]
• In gpio.ino, removed debounce logic and related variables from interrupt service routines and test setup, simplifying the interrupt handling for validation. [1] [2] [3]

I2C clock test enhancements:

• Modified DS1307 RTC test logic to set the halt bit when writing seconds, and added a 5-second run/stop sequence to verify clock operation and time change. [1] [2]

General improvements:

• Added missing #include <Arduino.h> in periman.ino for consistency and compatibility.

Test Scenarios

Locally

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[github-actions]

Test Results

 83 files   83 suites   25m 31s ⏱️
 55 tests  55 ✅ 0 💤 0 ❌
598 runs  598 ✅ 0 💤 0 ❌

Results for commit 4551b70.

♻️ 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
ESP32C5	0	⚠️ +26	0.00	⚠️ +0.01	0	0	0.00	0.00
ESP32P4	0	⚠️ +36	0.00	⚠️ +0.01	0	0	0.00	0.00
ESP32S3	0	0	0.00	0.00	0	0	0.00	0.00
ESP32S2	0	0	0.00	0.00	0	0	0.00	0.00
ESP32C3	0	⚠️ +26	0.00	⚠️ +0.01	0	0	0.00	0.00
ESP32C6	0	⚠️ +26	0.00	⚠️ +0.01	0	0	0.00	0.00
ESP32H2	0	⚠️ +26	0.00	⚠️ +0.01	0	0	0.00	0.00
ESP32	0	0	0.00	0.00	0	0	0.00	0.00

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

Target	ESP32C5		ESP32P4		ESP32S3		ESP32S2		ESP32C3		ESP32C6		ESP32H2		ESP32
Example	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM
libraries/ESP_I2S/examples/ES8388_loopback	⚠️ +26	0	⚠️ +26	0	-	-	0	0	⚠️ +26	0	⚠️ +26	0	⚠️ +26	0	0	0
libraries/ESP_I2S/examples/Simple_tone	⚠️ +26	0	⚠️ +26	0	-	-	0	0	⚠️ +26	0	⚠️ +26	0	⚠️ +26	0	0	0
tests/validation/gpio	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
tests/validation/i2c_master	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
tests/validation/periman	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
libraries/ESP_I2S/examples/Record_to_WAV	-	-	⚠️ +26	0	-	-	-	-	-	-	-	-	-	-	0	0
libraries/ESP_SR/examples/Basic	-	-	⚠️ +36	0	-	-	-	-	-	-	-	-	-	-	-	-