fix(assert): add new macro to format assert message

[XuNeo]

Description of the feature or fix

Fix #5441

Since LV_LOG_ERROR and similar macro works for all, let's add a new macro specially to format assert message. This way it's sure the VAR_ARGS is not empty.

Notes

• Update the Documentation if needed.
• Add Examples if relevant.
• Add Tests if applicable.
• If you added new options to lv_conf_template.h run lv_conf_internal_gen.py and update Kconfig.
• Run scripts/code-format.py (astyle needs to be installed) and follow the Code Conventions
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