Add support for multiple custom rule match_conditions

[ayeshajay]

Purpose

Add support for multiple custom rule match_conditions

Goals

We need to give support for the multiple match conditions with custom WAF rules.

Release note

Existing users need to update the existing condition to the following.

Existing

match_condition = {
            match_variable     = "Testing condition"
            match_values       = ["/test"]
            operator           = "contains"
            negation_condition = false
            transforms         = []
          }

New

match_condition = [{
            match_variable     = "Testing condition"
            match_values       = ["/test"]
            operator           = "contains"
            negation_condition = false
            transforms         = []
          }]