Expose yagna version in the provider offer as a property

[grisha87]

Why?

For the Golem Stats Page we are expected to deliver a breakdown of yagna versions used by providers on the network. We need to establish the version of yagna that the specific provider operates. Right now to establish this we need to extract the information from the metrics pushed by providers to yastats. That's really inconvenient.

What we would need?

It would be awesome if the yagna version would be advertised in the offer itself, so that when we utilize the passive market scan, we can obtain this information via this path.

Acceptance Criteria

• When running a passive market scan we can see the yagna version property (however you will name it) that will present the values like v0.16.0 for "stable", and pre-rel-v0.16.1-rc4 for pre-releases.