[EPIC] Separate out gcpFilestoreBackups from 2i2c support chart into it's own helm chart

[sgibson91]

Context

In #4391, we set up a system to automatically create and clear out backups of GCP Filestore instances. This involved a Python script and a Docker container to run it, and was deployed as an opt-in section of the support chart.

This issue tracks separating that feature out into it's own helm chart.

Task list

Tasks

Beta Give feedback

1. (1/5) Move the helm-charts/images/gcp-filestore-backups subdir into it's own github repo #4701
   +0
   
2. (2/5) Create a new helm chart for gcpFilestoreBackups project #4702
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3. (3/5) Configure the gcpFilestoreBackups helm chart to use chartpress #4703
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4. (4/5) Reconfigure the support chart so gcpFilestoreBackups chart is an opt-in dependency #4705
   0 of 2
   +0
   
5. (5/5) Ensure gcpFilestoreBackups documentation is up-to-date and the project is continuing to run on 2i2c cluster #4706
   +0
   

Definition of Done

• A helm chart for GCP filestore backups exists and is automated with chartpress
• The support chart is configured to use the new chart as an opt-in dependency
• The 2i2c cluster is updated to make use of the new chart

Pre-defined Definition of Done

• All the tasks have been completed
• It has been tested to work and to not break any existing functionality
• Documentation was added so other engineers can implement this in the future if needed

[yuvipanda]

I've prioritized #4683 above this one. Completing both should let us complete #4391

[yuvipanda]

To be refined and split up by @sgibson91. Once you split this up into smaller tasks, move them into the Refined column, remove this from 'up next' and unassign yourself.

[sgibson91]

Done!

[yuvipanda]

@sgibson91 is this done now?

[sgibson91]

Yes! 🎉