add(promtail): add our own promtail dependency App

[PrivatePuffin]

Description
The Promtail dependency for Loki has some issues with the location of the docker container logs on SCALE.
So we build our own to add as a dependency to our Loki App

Type of change

• Feature/App addition
• Bugfix
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor of current code

How Has This Been Tested?

Notes:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests to this description that prove my fix is effective or that my feature works
• I increased versions for any altered app according to semantic versioning

[truecharts-admin]

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