const: Add const keyword for all name pointer parameters

[MaJerle]

This pull requests fixes the compiler warning when creating TX objects with literal strings since we are passing literal string to the function accepting CHAR *, that can, by design, modify input parameter and therefore cause undefined system behavior.

All name pointers become const CHAR* type.

There is no backward incompatibility when creating objects, but there is a potential backward in-compatibility when calling tx_<modulename>_name_get function, because parameter shall be changed to const char* variable.

Currently we can get the name as:

CHAR* name;
tx_thread_name_get(..., &name);

New required function call:

const CHAR* name;
tx_thread_name_get(..., &name);

I've not seen tests for getting the name in the threadx, I also clearly assume that people using _get api are the minority.
From safety and quality standpoint, this upgrade makes a lot of sense.

PR checklist

• Updated function header with a short description and version number
• Added test case for bug fix or new feature
• Validated on real hardware C-M4, GCC