This PR proposes to set 403 as default deny status code instead of delegating it to the connectors.

Why?

If the rule status field is not set, Deny action is currently setting the status code of the interruption equal to 0. Only at the connector level, there is some logic to convert the 0 into a 403. Example in coraza-proxy-wasm:

	statusCode := interruption.Status
	if statusCode == 0 {
		statusCode = defaultInterruptionStatusCode
	}
	if err := proxywasm.SendHttpResponse(uint32(statusCode), nil, nil, noGRPCStream); err != nil {

Delegating it to the connector leads to SecAuditLogRelevantStatus not working properly. The regex ^(?:(5|4)(0|1)[0-9])$ tries to match tx.interruption.Status equal to 0 without succeeding.

This behaviour notably happens with CRS blocking rules that have the deny action not followed by an explicit status.

Possible workaround:

SecAuditLogRelevantStatus "^(?:(5|4)(0|1)[0-9]|0)$"