[Impeller] Fixes for GLES framebuffer status helper functions

[jason-simmons]

• Pass a target instead of a framebuffer name to glCheckFramebufferStatus
• Fix output of framebuffer attachment object types
• Fix labels of depth and stencil attachments

[chinmaygarde]

lol, I think we ran into the same issue simultaneously #56515. I am not sure about the read and draw framebuffer enums in this patch. My expectation is that just the GL_FRAMEBUFFER enum ought to be used.

[jason-simmons]

Using the GLES3-style constants in glCheckFramebufferStatus and glGetIntegerv clarifies which framebuffer is being queried. But there is no actual difference in functionality between GL_DRAW_FRAMEBUFFER and GL_FRAMEBUFFER in the API.

(see https://registry.khronos.org/OpenGL-Refpages/es3.0/html/glCheckFramebufferStatus.xhtml)

I'll close this PR - #56515 covers all of this.

[chinmaygarde]

Unfortunately, those enums are not available in ES2.