Fix missing TLS ServerName in HelmRepository

Add ServerName configuration to TLS config in HelmRepository client
options to ensure proper SNI (Server Name Indication) support for
virtual hosting environments. This addresses the regression introduced
when migrating from internal/tls to runtime/secrets, where ServerName
was not being set automatically.

Without ServerName, TLS handshakes fail with certificate mismatch
errors when connecting to Helm repositories using virtual hosting
where multiple repositories are hosted on the same IP address.

Signed-off-by: cappyzawa <cappyzawa@gmail.com>

Author: cappyzawa

internal/helm/getter/client_opts.go

@@ -122,7 +122,7 @@ func configureAuthentication(ctx context.Context, c client.Client, obj *sourcev1
 		}
 		certSecret = secret
 
-		tlsConfig, err := secrets.TLSConfigFromSecret(ctx, secret)
+		tlsConfig, err := secrets.TLSConfigFromSecret(ctx, secret, obj.Spec.URL, obj.Spec.Insecure)
 		if err != nil {
 			return false, nil, nil, fmt.Errorf("failed to construct Helm client's TLS config: %w", err)
 		}
@@ -138,7 +138,7 @@ func configureAuthentication(ctx context.Context, c client.Client, obj *sourcev1
 		}
 		authSecret = secret
 
-		methods, err := secrets.AuthMethodsFromSecret(ctx, secret)
+		methods, err := secrets.AuthMethodsFromSecret(ctx, secret, secrets.WithTLS(obj.Spec.URL, obj.Spec.Insecure))
 		if err != nil {
 			return false, nil, nil, fmt.Errorf("failed to detect authentication methods: %w", err)
 		}