feat: allow override of key location and remove old version support

[shawaj]

Issue

• Link: Syncrobit #60 and #58 ecc selection helium-syncrobit#2 (comment)
• Summary: need to support multiple possible key locations for Syncrobit

How

This is a quick and hacky fix to the issue described here NebraLtd/helium-syncrobit#2 (comment)

The idea is to allow a device level environment variable SWARM_KEY_URI_OVERRIDE in balenaCloud to override the key location in the assigned variant without needing to define a new variant. This is useful for testing new devices or in instances like this Syncrobit one to provide a quick fix until we have implemented a "proper" fix to this issue.

This additionally changes the following:

• we hard code the gateway_mfr_rs version in the test and production python package build actions, so there is no need to support old versions of gateway-mfr-rs
• due to removing the above, there is also no need to keep the KEY_STORAGE_BUS key in the hardware variants as this is not used anywhere else that I'm aware of (we should double check this in config, diag, miner, packet forwarder and multiplexer containers just to be 100% sure)
  • Used as a fallback in diag but not required

Screenshots

References

Relates-to: NebraLtd/helium-syncrobit#2
Relates-to: #221
Relates-to: #222

Checklist

• Tests added
• Cleaned up commit history (rebase!)
• Documentation added
• Thought about variable and method names

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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0.0% Duplication

[vstrong-info]

Thank you @shawaj
Is it as easy as to add this variable to a specific miner in Balena Cloud? What Service does it need to be added to?
In this example, I put value of 1 but it may be 0, 1, 2, 3 or 4 - the slot number - and then see which one brings miner online?

Thank you in advance.

[shawaj]

Thank you @shawaj Is it as easy as to add this variable to a specific miner in Balena Cloud? What Service does it need to be added to? In this example, I put value of 1 but it may be 0, 1, 2, 3 or 4 - the slot number - and then see which one brings miner online? Thank you in advance.

No it's not that simple. Also the update hasn't made it into production yet we are still testing it. Once it's there we will document it :-)

[vstrong-info]

@shawaj There are two devices with this issue in my fleet that I shared with you, if you want to test the patch on them.
UUID - fc777aa2ee7382a8e13784746e703b6f
UUID - 7710b75d7364a77375ec9d6f541ab6a2
Thank you.