[naga wgsl-in] Implement any() and all() during const evaluation

[jamienicol]

Connections
Part of #4507 . When testing CTS changes for #7035 I noticed we still get quite a few failures in the webgpu:shader,validation,const_assert,const_assert:constant_expression_assert:* group due to this.

Description
any() and all() should be evaluated at constant time.

eg naga should transform this shader:

var a = any(vec2(false, true));
var b = all(vec2(false, true));

to

var a: bool = true;
var b: bool = false;

Note this already works for the scalar versions of these function as we handle that specially in the WGSL frontend (in commit 3bd2834). This makes us handle vectors args too.

Testing
Added snapshot tests

Checklist

• Run cargo fmt.
• Run cargo clippy. If applicable, add:
• Run cargo xtask test to run tests.
• Add change to CHANGELOG.md. See simple instructions inside file.

[ErichDonGubler]

LGTM, minus a question.