Remove executable permissions of tests.

[haoliang-Zhu]

1. Remove executable permissions for all tests files. This permission will affect rpm packaging.

[xupengfe]

Removing executable permissions of tests looks good.

And some other actions are included but commit description doesn't mention:

2. Added the BM/tdx-compliance/tests-trigger-cpuid.sh and BM/tdx-compliance/testallcase.sh executable permissions.

3. Code improvement for BM/tdx-compliance/tests-trigger-cpuid.sh

For points 2 and 3, it's better to split them into two commits to perform these actions.
It's best to do only one thing for one commit.

Thanks!

[haoliang-Zhu]

Thank you for your suggestion, after that I will pay attention to doing only one thing per commit.