fix examples after the switch for msaa to a component

[mockersf]

Objective

• Move Msaa to component #14273 changed MSAA to a component, and broke some examples

• SSAO needs MSAA to be disabled
  

  bevy/crates/bevy_pbr/src/ssao/mod.rs

  Line 495 in f0ff7fb

  "SSAO is being used which requires Msaa::Off, but Msaa is currently set to Msaa::{:?}",

• AlphaMode::AlphaToCoverage needs MSAA to be not off to do something
  

  bevy/examples/3d/transparency_3d.rs

  Lines 113 to 117 in f0ff7fb

  	/// - [`AlphaToCoverage`](AlphaMode::AlphaToCoverage): Object fades in and out
  	/// in steps corresponding to the number of multisample antialiasing (MSAA)
  	/// samples in use. For example, assuming 8xMSAA, the object will be
  	/// completely opaque, then will be 7/8 opaque (1/8 transparent), then will be
  	/// 6/8 opaque, then 5/8, etc.

Solution

• change MSAA in those examples