Added CustomID to UploadImageParams

[emilpriver]

Description

I added support for CustomID when we upload images to Cloudflare images which I hope is supported by CF API: https://developers.cloudflare.com/images/upload-images/upload-custom-path/

Please correct me if I'm wrong but Custom ID means that we can select which ID to have for the image right?

Has your change been tested?

Yes. I tested this in my own app and seems to be working

Types of changes

What sort of change does your code introduce/modify?

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• This change is using publicly documented in cloudflare/api-schemas
  and relies on stable APIs.

[emilpriver]

The reason for the failed CI is

go: downloading golang.org/x/exp/typeparams v0.0.0-20221212164502-fae10dda9338
go: golang.org/x/tools/cmd/goimports@latest (in golang.org/x/tools@v0.25.0): go.mod:3: invalid go version '1.22.0': must match format 1.23
internal/tools/tools.go:22: running "go": exit status 1

Do you want me to fix this?