feat: add global helm value for ImagePullPolicy

[7h3-3mp7y-m4n]

Description

Added Helm helper function and a global helm variable imagepullpolicy
Fixes #2362

How to test

• Manual Test A
• Unit Test B
• Integration Test C

Checklist

• My PR fulfills the Definition of Done of the corresponding issue and not more (or parts if the issue is separated
  into multiple PRs)
• I used descriptive commit messages to help reviewers understand my thought process
• I signed off all my commits according to the Developer Certificate of Origin (DCO)
  see Contribution Guide
• My PR title is formatted according to the semantic PR conventions described in
  the Contribution Guide
• My code follows the style guidelines of this project (golangci-lint passes, YAMLLint passes)
• I regenerated the auto-generated docs for Helm and the CRD documentation (if applicable)
• I have performed a self-review of my code
• I have made corresponding changes to the documentation (if needed)
• My changes result in all-green PR checks (first-time contributors need to ask a maintainer to approve their test runs)
• New and existing unit and integration tests pass locally with my changes

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[odubajDT]

Hi @7h3-3mp7y-m4n any updates on this PR? Do you need support ? Thank you!

[odubajDT]

This PR is opened for a month without any activity, closing it and unassigning the author from the ticket. If you would like to continue, please feel free to open a new PR!