Unify version and distribution info across all services (i.e. _meta package)

[pcrespov]

Is there an existing issue for this?

• I have searched the existing issues

Planned changes

All services include _meta to incorporate some metadata con the services distribution (e.g. version, etc). The creation of these constants is different in every service. let's unify them.

Regarding versions: the source of truth is going to be packaging.version.Version We found that e.g. versions 1.0.0.a1 was failing to be parsed with our regex while packaging.version.Version could parse it. We found this issue in #6175 and partially resolved it.

• What about using packaging.version.VERSION_PATTERN as regex or even better Version._regex?
• How does this affect to our service versioning? e.g. front end will not understand pre-release and meta segments
• test that this version is compatible with paths

Tasks

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1. Unify definition of Version string
2. Unify _meta packages across all services