feat: add tests for waf component

[aaronwalker]

Add Tests for WAF Component

This PR adds a comprehensive test suite for the WAF Classic component, including both cftest configurations and RSpec tests.

Changes

• Added test configuration for WAF Classic resources
• Added RSpec test suite
• Added GitHub Actions workflow
• Fixed test configuration to prevent duplication
• Updated tests to match WAF Classic resource structure

Test Coverage

The test suite covers:

• Component compilation validation
• IPSet configuration and properties
• WAF Rule configuration
• WebACL properties and rules
• Output validation

Testing

To run the tests locally:

# Run all tests
VALIDATE=--no-validate rspec

# Run specific test file
VALIDATE=--no-validate rspec spec/default_spec.rb

# Run cfhighlander test
cfhighlander cftest --tests tests/default.test.yaml

Test Configuration Example

control_ipset:
  - name: wafrBlacklistIpSet
    ipsetdescriptors:
      - type: IPV4
        value: 192.0.2.44/32

wafrules:
  - ruleid: wafrIPBlockRule
    predicates:
      - conditionName: wafrBlacklistIpSet
        negated: false
        type: IPMatch

wafacl:
  name: test-waf
  metricName: TestWAF
  rules:
    - ruleid: wafrIPBlockRule
      action: BLOCK
      priority: 1