Fixed an issue where the shader would come off when run setTexture.

[HirokiIshimori]

Summary

Fix issue https://github.com/cocos2d/cocos2d-x/issues/20600 , When I set a shader in Sprite and execute setTexture, the shader comes off.

Event

1. After doing setProgramState as below ...

sprite->setProgramState(programState);

2. Try calling setTexture.

sprite->setTexture(filePath);

Then the shader will not run.

Why I submitted a Pull Request.

Currently, it can be dealt with by calling setProgramState immediately after calling setTexture as shown below.

sprite->setTexture(filePath);
sprite->setProgramState(mProgramState);

But developers need to explicitly keep ProgramState, and I think it's a redundant implementation. So I submitted a Pull Request.