Change log for GCP_APIGEE_X

Date Changes
2024-10-16 Added support for cloud logging policy logs.
2024-09-30 Enhancement:
- When "jsonPayload.responseStatusCode" is an integer then converted it to string.
- Converted "jsonPayload.headers.x-forwarded-proto" to uppercase and then mapped to "network.application_protocol".
- Mapped "jsonPayload.headers.traceparent" to "additional.fields".
- Mapped "jsonPayload.headers.tracestate" to "additional.fields".
2024-08-29 Enhancement:
- Mapped "jsonPayload.headers.x-apim-gateway-id", "jsonPayload.headers.x-apigee-tracking-id", "jsonPayload.headers.x-request-id-client-supplied", "jsonPayload.env", "jsonPayload.messageid", "jsonPayload.org" to "principal.resource.attribute.labels".
- Mapped "jsonPayload.headers.x-apigee-tls-cipher" to "network.tls.cipher".
- Mapped "jsonPayload.headers.user-agent" to "network.http.user_agent".
- Mapped "jsonPayload.headers.host" to "principal.hostname".
- Mapped "jsonPayload.headers.x-apigee-tls-server-name" to "network.tls.client.server_name".
- Mapped "jsonPayload.headers.x-apigee-tls-protocol" to "network.tls.version_protocol".
- If "jsonPayload.externalClientIp" is valid ip, then mapped to "target.ip" and "target.asset.ip" else mapped to "principal.resource.attribute.labels".
- Mapped "jsonPayload.responseStatusCode" to "network.http.response_code".
2024-07-29 Enhancement:
- Mapped "jsonPayload.consumerId", "jsonPayload.targetResponseTime", "jsonPayload.requestTime", "jsonPayload.proxyRequest.headers", "jsonPayload.proxyResponse.headers", "jsonPayload.apigeeInstance", "jsonPayload.customerId", "jsonPayload.productName", "jsonPayload.appName", "jsonPayload.proxyBasePath", "jsonPayload.proxyResourcePath", "jsonPayload.consumerName", "jsonPayload.targetRequestTime", "jsonPayload.msgType", "jsonPayload.apiName", "jsonPayload.serviceAudience", and "jsonPayload.responseTime" to "additional.fields".
- Mapped "jsonPayload.targetServer" to "target.url".
- Mapped "jsonPayload.resourceURL" to "principal.resource.attribute.labels".
- Mapped "jsonPayload.targetAudience" and "jsonPayload.targetEndpointName" to "target.resource.attribute.labels".
- Mapped "jsonPayload.forwardingVMIp" to "principal.ip" and "principal.asset.ip"
- Mapped "jsonPayload.externalClientIp" to "target.ip" and "target.asset.ip".
2024-05-22 Promoting to default parser.