[naga wgsl] all swizzle components must be either color or dimension

[sagudev]

Connections
fixes #6184

Description
Added check that all swizzle components are either dimension (xyzw) or color (rgba).

Testing
There is new test and I will do CTS run in servo.

Checklist

• Run cargo fmt.
• Run cargo clippy. If applicable, add:
  • --target wasm32-unknown-unknown
  • --target wasm32-unknown-emscripten
• Run cargo xtask test to run tests.
• Add change to CHANGELOG.md. See simple instructions inside file.

[sagudev]

CTS run in servo:

OK /_webgpu/webgpu/cts.https.html?q=webgpu:shader,validation,expression,access,vector:abstract:*
   PASS [expected FAIL] subtest: :vector_width=2;abstract_type="int";concrete_type="i32"
   PASS [expected FAIL] subtest: :vector_width=2;abstract_type="float";concrete_type="u32"
   PASS [expected FAIL] subtest: :vector_width=2;abstract_type="float";concrete_type="i32"
   PASS [expected FAIL] subtest: :vector_width=2;abstract_type="float";concrete_type="f32"
   PASS [expected FAIL] subtest: :vector_width=3;abstract_type="int";concrete_type="i32"
   PASS [expected FAIL] subtest: :vector_width=3;abstract_type="float";concrete_type="u32"
   PASS [expected FAIL] subtest: :vector_width=3;abstract_type="float";concrete_type="i32"
   PASS [expected FAIL] subtest: :vector_width=3;abstract_type="float";concrete_type="f32"
   PASS [expected FAIL] subtest: :vector_width=4;abstract_type="int";concrete_type="i32"
   PASS [expected FAIL] subtest: :vector_width=4;abstract_type="float";concrete_type="u32"
   PASS [expected FAIL] subtest: :vector_width=4;abstract_type="float";concrete_type="i32"
   PASS [expected FAIL] subtest: :vector_width=4;abstract_type="float";concrete_type="f32"

[teoxoy]

Nice!