feat(go): Add support for file upload dynamic snippets

This updates Go's DynamicSnippetsGenerator so that it supports file upload snippets, and considers both the inlineFileProperties and inlinePathParameters configuration options.

For example, given the following request:

{
  endpoint: {
      method: "POST",
      path: "/just-file-with-query-params"
  },
  auth: undefined,
  pathParameters: undefined,
  queryParameters: {
      integer: 42,
      maybeString: "exists"
  },
  headers: undefined,
  requestBody: {
      file: "Hello, world!"
  }
}

The corresponding Go snippet with inlineFileProperties is shown below:

package example

import (
    context "context"
    acme "github.com/acme/acme-go"
    client "github.com/acme/acme-go/client"
    strings "strings"
)

func do() {
    client := client.NewClient()
    client.Service.JustFileWithQueryParams(
        context.TODO(),
        &acme.JustFileWithQueryParamsRequet{
            Integer: 42,
            MaybeString: acme.String(
                "exists",
            ),
            File: strings.NewReader(
                "Hello, world!",
            ),
        },
    )
}

fern-api / fern

feat(go): Add support for file upload dynamic snippets #5252