Align index buffe size when vertex_buffer_unified_memory enable

[vonchenplus]

Close #7171

Before：

After：

Before： After：

This should fix more other games, more tests are welcome

[german77]

Fixes rendering in Werewolf Princess

[Timmy5942]

Finish them all off?, static_cast<GLsizeiptr>(Common::AlignUp(size, 4)), GL_RED, GL_UNSIGNED_INT, &value);

Est

gl_buffer_cache.zip

[Timmy5942]

Lgtm

[liamwhite]

Is the game depending on an out-of-bounds read of the index buffer in this case? The other buffer bindings don't adjust the size in this way