[bitnami/*] Migrate VIB's runtime_params to independent file

[FraPazGal]

Description of the change

This PR implements the usage of runtime-parameters.yaml files, deprecating their definition in the vib-*.json pipelines DSLs as a base64 encoded string. The main changes this PR introduces are:

• There is now a .vib/asset/runtime-parameters.yaml file containing the decoded string previously found at phases.verify.context.runtime_parameters
• Removed vars.yaml files, Goss' vars file is now runtime-parameters.yaml

Benefits

• Removes obscurity regarding the testing chart's values.
• Simplifies Goss' file structure.

Possible drawbacks

• Initial minor confusion given the migration done to the runtime_params definition.
• Opened PRs may require a rebase from main to avoid conflicts in the CI/CD runs.

The team will be internally notified of these changes to mitigate these issues.

Additional information

Some Goss tests needed to be adapted to the yaml structure of the new runtime-parameters.yaml. This was caused by the use of custom yaml structures in vars.yaml.

Fixed some minor discrepancies between runtime_param and old vars.

Changes tested in fork:

• CI pipeline & CD pipeline changes
• Test 1: Test CI & CD using runtime_params file FraPazGal/charts#148
• Test 2: Test CI & CD with runtimes file FraPazGal/charts#149

ℹ️ Non-standard cases tested locally.

Checklist

• Title of the pull request follows this pattern [bitnami/<name_of_the_chart>] Descriptive title
• All commits signed off and in agreement of Developer Certificate of Origin (DCO)

[joancafom]

Thanks for your PR! I left you some minor comments about the documentation

[joancafom]

LGTM! Huge PR! 🚀