Update service + resource path for the TAG_KEY_HTTP_URL

[chamil321]

Purpose

$subject

Related ballerina-platform/ballerina-library#1630

Approach

[Micro-GW] (VASTTRAFIKAPIMSUB-53) Prometheus metrics per unique url.

Sample

service passthrough on new http:Listener(9090) {
    @http:ResourceConfig {
        path: "/{abc}"
    }
    resource function passthrough(http:Caller caller, http:Request req) {
    }
}

Metric: http_url="/passthrough/_abc_

http_response_time_seconds_mean{protocol="http",http_method="POST",service="passthrough",http_url="/passthrough/_abc_",resource="passthrough",timeWindow="60000",} 0.1337890625

Check List

• Read the Contributing Guide
• Updated Change Log
• Checked Tooling Support (#)
• Added necessary tests
  • Unit Tests
  • Spec Conformance Tests
  • Integration Tests
  • Ballerina By Example Tests
• Increased Test Coverage
• Added necessary documentation
  • API documentation
  • Module documentation in Module.md files
  • Ballerina By Examples