Cannot configure http log streaming due to bad validation rule

[tom-mckay]

We are seeing an error when creating an hcp_vault_cluster resource:

Error: http configuration is invalid: allowed values for http_codec are only "JSON" or "NDJSON"

The resource includes an audit_log_config like this:

resource "hcp_vault_cluster" "vault_cluster" {
...snip...
  audit_log_config {
    http_codec = "JSON"
    http_method = "POST"
    http_uri = var.sumologic_collector_url
  }
}

It seems like this code is checking the wrong variable:

terraform-provider-hcp/internal/providersdkv2/resource_vault_cluster.go

Lines 1590 to 1592 in fcbb47d

	if strings.ToUpper(httpMethod) != "JSON" && strings.ToUpper(httpMethod) != "NDJSON" {
	invalidProviderConfigError = diag.Errorf("http configuration is invalid: allowed values for http_codec are only \"JSON\" or \"NDJSON\"")
	}

httpMethod should probably be httpCodec here. The lines prior to this already validated httpMethod. This looks like a copy/paste error.