Limit compatibility to Helm =>v3.0.0,<4.0.0 (#1039)

SUMMARY
Helm v4 is a major version with backward-incompatible changes, including to the flags and output of the Helm CLI and to the SDK. This version is currently not supported in the kubernetes.core. This PR is related to #1038 and is a short-term solution to mark compatibility explicitly
ISSUE TYPE

Bugfix Pull Request
Docs Pull Request

COMPONENT NAME

helm
helm_template
helm_info
helm_repository
helm_pull
helm_registry_auth
helm_plugin
helm_plugin_info

ADDITIONAL INFORMATION
Added `validate_helm_version()`` method to AnsibleHelmModule that enforces version constraint >=3.0.0,<4.0.0.
Fails fast with clear error message: "Helm version must be >=3.0.0,<4.0.0, current version is {version}"
Some modules (i.e. helm_registry_auth) technically is compatible with Helm v4, but validation was added to all helm modules.
Partially coauthored by GitHub Copilot with Claude Sonnet 4 model.
Addresses issue #1038

Reviewed-by: GomathiselviS <gomathiselvi@gmail.com>
Reviewed-by: Yuriy Novostavskiy <yuriy@novostavskiy.kyiv.ua>
Reviewed-by: Mike Graves <mgraves@redhat.com>
Reviewed-by: Alina Buzachis
Reviewed-by: Bianca Henderson <beeankha@gmail.com>

plugins/modules/helm_template.py

@@ -347,6 +347,9 @@ def main():
     if not IMP_YAML:
         module.fail_json(msg=missing_required_lib("yaml"), exception=IMP_YAML_ERR)
 
+    # Validate Helm version >=3.0.0,<4.0.0
+    module.validate_helm_version()
+
     helm_cmd = module.get_helm_binary()
 
     if plain_http: