Fix panic when valueYamlFiles field in helm.v3.Release resources are nil

[rquitales]

Proposed changes

This resolve a provider panic when valueYamlFiles field in helm.v3.Release resources are nil.

Related issues (optional)

#3600

[EronWright]

LGTM

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.17%. Comparing base (27f7406) to head (2457872).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3601   +/-   ##
=======================================
  Coverage   41.16%   41.17%           
=======================================
  Files          87       87           
  Lines       12915    12917    +2     
=======================================
+ Hits         5316     5318    +2     
  Misses       7204     7204           
  Partials      395      395           

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[rquitales]

CI was previously failing due to: #3602

[pulumi-bot]

This PR has been shipped in release v4.22.2.