Make shader write&read storage buffers match non readonly layouts

[fornwall]

Checklist

• Run cargo clippy.
• Run cargo clippy --target wasm32-unknown-unknown if applicable.
• Add change to CHANGELOG.md. See simple instructions inside file.

Connections
See #2897, write-only storage buffer cannot match a Pipeline Layout.

Description
From the linked issue: When you provide a storage buffer pipeline layout with read-only set to false, if the shader marks the buffer is write, it will complain about a mismatched PLL and shader

Testing
Mark a storage storage buffer as write in a shader, and use it with a buffer pipeline layout with read-only set to false. There is also a unit test of the address_space_matches function.

[fornwall]

After doing this, I realised that perhaps write-only storage buffers are not allowed in WGSL? From https://www.w3.org/TR/WGSL/#storage-buffer:

A variable in the storage address space is a storage buffer variable. Its store type must be a host-shareable type and must satisfy the address space layout constraints. The variable may be declared with a read or read_write access mode; the default is read.

If so, should #2897 be closed instead?

[cwfitzgerald]

Welp, lets go ahead and merge this as it fixes the current behavior, thanks! But apparently they aren't anymore. There was never really a point, but whatever. Removing that is a separate issue.

[cwfitzgerald]

Some small nits, but code looks good

[fornwall]

@cwfitzgerald Thanks for the feedback! I addressed your comments, you could re-review?

[cwfitzgerald]

Great, thanks!