Implement wgpuDeviceCreateShaderModuleTrusted (fixes #396)

[lisyarus]

Checklist

• cargo clippy reports no issues
• cargo doc reports no issues
• cargo deny issues have been fixed or added to deny.toml
• Human-readable change descriptions added to CHANGELOG.md under the "Unreleased" heading.
  • If the change does not affect the user (or is a process change), preface the change with "Internal:"
  • Add credit to yourself for each change: Added new functionality. @githubname

Description

Implemented wgpuDeviceCreateShaderModuleTrusted. It only differs from wgpuDeviceCreateShaderModule by a single runtimeChecks parameter, which takes the values of a new bit flag WGPUShaderRuntimeChecks. It isn't specified as a bitfield in wgpu, but it is a struct containing just bools, so I figured a bitmask on the native side is appropriate.

In the implementation, the two methods only differ in a single line, so I extracted a private create_shader_module function that both methods forward to.

Related Issues

This PR fixes #396