leverage generateTemplates capability of harvester/addons (backport #783)

[mergify]

Problem:

PR introduces minor changes to installer to leverage the new generateTemplate capability added to harvester/addons

Prior to this change the addon updates were being managed by updates to version_info file, and also updating the version details in the rancher-22-addons.yaml template file.

Solution:

This has been simplified to use the chart versions in version_info file and allow ability to generate template file dynamically. This ensures that chart and image version change is only ever kept in one single location.

addons PR: harvester/addons#4

Related Issue:
harvester/harvester#4937
Test plan:

---

This is an automatic backport of pull request #783 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 677447c has failed:

On branch mergify/bp/v1.4/pr-783
Your branch is up to date with 'origin/v1.4'.

You are currently cherry-picking commit 677447c.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   scripts/build

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   scripts/build-bundle

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[ibrokethecloud]

@Mergifyio rebase

[mergify]

rebase

☑️ Nothing to do

• -conflict [📌 rebase requirement]
• -closed [📌 rebase requirement]
• queue-position=-1 [📌 rebase requirement]
• any of:
  • #commits-behind>0 [📌 rebase requirement]
  • #commits>1 [📌 rebase requirement]
  • -linear-history [📌 rebase requirement]