[Hubs] Ingest GCP billing data

[flanakin]

📝 Scenario

As a hub admin, I need to connect my hub to Google Cloud in order to monitor GCP and Microsoft Cloud costs in a single pane of glass

💎 Solution

Create a pipeline to ingest FOCUS cost data from Google Cloud Storage into the ingestion container.

📋 Tasks

### Required tasks
- [x] Create base pipeline
- [x] Upload files 
- [ ] Add the linked service and dataset -- #1542 
- [ ] Add the trigger
- [ ] Add onboarding doc
- [ ] Update marketing page
- [ ] Update hubs overview doc
- [ ] Validation -- We will need help from others. Please leave a comment if you can help!

### Stretch goals
- [ ] Add file uploading to the hub-storage module -- #1543 
- [ ] Change file uploading to use the hub-storage module
- [ ] How can columns be customized (e.g., add custom x_ResourceGroupName column)

🙋‍♀️ Ask for the community

We could use your help:

1. Please vote this issue up (👍) to prioritize it.
2. Leave comments to help us solidify the vision.

[egerstenTAMU]

I am working on this, would love to get notified when this is done

[egerstenTAMU]

1. as far as any random people requesting or working on this feature request, figured it may be handy to reference this article written by @thecloudman https://techcommunity.microsoft.com/blog/finopsblog/getting-started-with-finops-hubs-multicloud-cost-reporting-with-azure-and-google/4415190 on the Microsoft Blog.

2. I don't believe it supports the latest versions of FTK but it does include a full end to end solution for a prior version, I just haven't got it working yet because of the PBI ingestion. If anyone is working on this as well, please comment below or find a way to message me here. Would love to chat and make sure this can be closed out, even if unofficially :)

3. I also just saw this "- [ ] Validation -- We will need help from others. Please leave a comment if you can help!"
   3a. Consider this my comment to be a validator 👍 🙏 😄