fix(arduino): changes ESP32 definition in CMakeLists.txt file

[SuGlider]

Description of Change

Fixes an issue related to esp_matter component that defines a path using ESP32 as folder.
Because Arduino defines ESP32 to 1, it causes an expansion error for folder using ESP32 folder name.

-DESP32 ==> #define ESP32 1
#define CHIP_PLATFORM_CONFIG_INCLUDE <platform/ESP32/CHIPPlatformConfig.h>
will expand to
#define CHIP_PLATFORM_CONFIG_INCLUDE <platform/1/CHIPPlatformConfig.h>

Tests scenarios

Building Arduino + Matter as IDF Component in the same project.

Related links

#7432 (comment)

[github-actions]

Warnings

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[Jason2866]

@SuGlider PR brakes compability with pioarduino/Platformio. It causes masses of redefine warnings

Building in release mode
Compiling .pio/build/tasmota32-nspanel/src/tasmota.ino.cpp.o
Building .pio/build/tasmota32-nspanel/bootloader.bin
Generating partitions .pio/build/tasmota32-nspanel/partitions.bin
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
esptool.py v4.7.6
Creating esp32 image...
Merged 2 ELF sections
Successfully created esp32 image.
Compiling .pio/build/tasmota32-nspanel/lib3cf/Wire/Wire.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Compiling .pio/build/tasmota32-nspanel/lib53b/Adafruit_CCS811-1.0.0.14/Adafruit_CCS811.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Compiling .pio/build/tasmota32-nspanel/lib18d/SPI/SPI.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Archiving .pio/build/tasmota32-nspanel/lib3cf/libWire.a
Indexing .pio/build/tasmota32-nspanel/lib3cf/libWire.a
Compiling .pio/build/tasmota32-nspanel/libc70/Adafruit_MAX31865-1.1.0-custom/Adafruit_MAX31865.cpp.o
Archiving .pio/build/tasmota32-nspanel/lib18d/libSPI.a
Archiving .pio/build/tasmota32-nspanel/lib53b/libAdafruit_CCS811-1.0.0.14.a
Indexing .pio/build/tasmota32-nspanel/lib53b/libAdafruit_CCS811-1.0.0.14.a
<command-line>: warning: "ESP32" redefined
Indexing .pio/build/tasmota32-nspanel/lib18d/libSPI.a
<command-line>: note: this is the location of the previous definition
Compiling .pio/build/tasmota32-nspanel/libf9d/Adafruit_MCP9808_Tasmota/Adafruit_MCP9808.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Compiling .pio/build/tasmota32-nspanel/lib2f4/Adafruit_BusIO/Adafruit_BusIO_Register.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Archiving .pio/build/tasmota32-nspanel/libc70/libAdafruit_MAX31865-1.1.0-custom
Indexing .pio/build/tasmota32-nspanel/libc70/libAdafruit_MAX31865-1.1.0-custom
Compiling .pio/build/tasmota32-nspanel/lib2f4/Adafruit_BusIO/Adafruit_I2CDevice.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Archiving .pio/build/tasmota32-nspanel/libf9d/libAdafruit_MCP9808_Tasmota.a
Indexing .pio/build/tasmota32-nspanel/libf9d/libAdafruit_MCP9808_Tasmota.a
Compiling .pio/build/tasmota32-nspanel/lib2f4/Adafruit_BusIO/Adafruit_SPIDevice.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Compiling .pio/build/tasmota32-nspanel/libc3a/Adafruit_PM25AQI-1.0.6/Adafruit_PM25AQI.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Compiling .pio/build/tasmota32-nspanel/lib0ea/Adafruit_SGP30-1.2.0/Adafruit_SGP30.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Archiving .pio/build/tasmota32-nspanel/lib2f4/libAdafruit_BusIO.a
Indexing .pio/build/tasmota32-nspanel/lib2f4/libAdafruit_BusIO.a
Compiling .pio/build/tasmota32-nspanel/libdee/Adafruit_SGP40-1.1.0/Adafruit_SGP40.cpp.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
Archiving .pio/build/tasmota32-nspanel/libc3a/libAdafruit_PM25AQI-1.0.6.a
Indexing .pio/build/tasmota32-nspanel/libc3a/libAdafruit_PM25AQI-1.0.6.a
Compiling .pio/build/tasmota32-nspanel/libdee/Adafruit_SGP40-1.1.0/sensirion_voc_algorithm.c.o
<command-line>: warning: "ESP32" redefined
<command-line>: note: this is the location of the previous definition
... and many more.

[Jason2866]

As it used before it was just a compile flag setting. Since Matter is currently not supported nor working imho the PR should reverted until a non conflicting solution is found.

EDIT: Probably fixed with espressif/esp32-arduino-lib-builder#217

[SuGlider]

Yes, espressif/esp32-arduino-lib-builder#217 will fix PIO adding -DESP32=ESP32 to its settings.