ETR01SDK-574: Add tests support for NUCLEO U545RE-Q

[medexs]

Description

Adds functional test support for the STM32 NUCLEO U545RE-Q board.

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Type of Change

Select the type(s) that best describe your change:

• 🐛 Bug fix
• ✨ New feature
• 🧹 Code cleanup or refactoring
• 📝 Documentation update
• 🔧 Build system or toolchain update
• 🔒 Security improvement
• Other (please describe):

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Checklist

Before submitting, please confirm that you have completed the following:

• I opened the Pull Request to the develop branch
• I followed the project's code guidelines
• I formatted the code using clang-format with the recommended configuration
• I updated the changelog, or this change does not require it (e.g., internal or non-functional update)
• The project builds without errors or warnings
• I have verified the functionality against the hardware/model as applicable
• I have ensured that public APIs remain backward compatible (if applicable)
• This PR is ready for review by maintainers (no WIP commits left) and marked as Ready for Review

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[Copilot]

Pull request overview

This PR adds functional test support for the STM32 NUCLEO U545RE-Q board by providing board-specific configuration, initialization code, and build system setup.

Changes:

• STM32 HAL initialization and peripheral configuration (RNG, UART, SPI, GPIO)
• Platform-specific implementations for WolfCrypt and MbedTLS v4 entropy/RNG integration
• CMake build configuration and linker script for the target hardware

Reviewed changes

Copilot reviewed 18 out of 130 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/functional/stm32/nucleo_u545re_q/Src/main.c	Main entry point with peripheral initialization and test execution wrapper
tests/functional/stm32/nucleo_u545re_q/Src/wolfcrypt/wolfcrypt_platform.c	WolfCrypt RNG seed generation using STM32 HAL
tests/functional/stm32/nucleo_u545re_q/Src/mbedtls_v4/mbedtls_platform.c	MbedTLS v4 entropy source and time implementation
tests/functional/stm32/nucleo_u545re_q/Src/system_stm32u5xx.c	STM32U5 system initialization and clock configuration
tests/functional/stm32/nucleo_u545re_q/Src/stm32u5xx_it.c	Interrupt service routines
tests/functional/stm32/nucleo_u545re_q/Src/stm32u5xx_hal_msp.c	MSP initialization for RNG, SPI, and UART peripherals
tests/functional/stm32/nucleo_u545re_q/STM32U545RETXQ_FLASH.ld	Linker script defining memory layout
tests/functional/stm32/nucleo_u545re_q/CMakeLists.txt	Build configuration for test executables
tests/functional/stm32/nucleo_u545re_q/Inc/*.h	Header files for HAL configuration and declarations
tests/functional/stm32/nucleo_u545re_q/Src/mbedtls_v4/*.h	MbedTLS v4 configuration files
tests/functional/stm32/nucleo_u545re_q/Src/wolfcrypt/user_settings.h	WolfCrypt configuration

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[andreondra]

OK. Two things only:

• If you have some spare time, you can try to reduce the vendor directory.
• I'm not sure if there can be two copyright notices (main.c).