[v2.9] pin rancher capi chart version

[vardhaman22]

Issue:

#45099

1. added a setting CATTLE_RANCHER_PROVISIONING_CAPI_VERSION similar to CATTLE_RANCHER_WEBHOOK_VERSION
2. updated unit test cases for CAPI chart and made them similar to rancher-webhook tests.
3. added exact version setting for capi in controller.

Problem

capi chart was being auto upgraded to newer version and if there are some breaking changes in the new CAPI chart it was breaking an older running rancher instance.

Solution

pin CAPI chart to a fix version in rancher through settings.

Testing

1. rancher docker install and checking the CAPI chart version.
   --> successful chart version is same as the one specified in build.yaml 103.2.0+up0.0.1
   

2. rancher docker install with env variable to override the chart version to 103.0.0+up0.0.1
   --> successful chart version is same as the env variable passed.
   

Engineering Testing

Manual Testing

Automated Testing

• Test types added/modified:
  • Unit
  • Integration (Go Framework)
  • Integration (v2prov Framework)
  • Validation (Go Framework)
  • Other - Explain: EXPLAIN
  • None
  • REMOVE NOT APPLICABLE BULLET POINTS ABOVE
• If "None" - Reason: EXPLAIN THE REASON
• If "None" - GH Issue/PR: LINK TO GH ISSUE/PR TO ADD TESTS

Summary: TODO

QA Testing Considerations

Regressions Considerations

TODO

Existing / newly added automated tests that provide evidence there are no regressions:

• TODO