Fluent Bit 3.1.8

https://fluentbit.io/announcements/v3.1.8/

What's Changed

• engine: added missing explicit cast (CID 508212) by @leonardo-albertovich in #9330
• tests: internal: signv4: fixed leak (CID 508222) by @leonardo-albertovich in #9345
• tests: internal: signv4: uncommented code that caused a leak (CID 508181) by @leonardo-albertovich in #9349
• in_elasticsearch: fixed potential issue caused by ingored reallocation (CID 508180) by @leonardo-albertovich in #9357
• in_elasticsearch: fixed memory leak (CID 507822) by @leonardo-albertovich in #9359
• release: update to 3.1.8 by @github-actions in #9324
• out_opentelemetry: fixed memory leaks (CID 508192) by @leonardo-albertovich in #9335
• in_calyptia_fleet: fixed memory leaks (CID 508187) by @leonardo-albertovich in #9347
• input: added missing initializer (CID 508207) by @leonardo-albertovich in #9332
• out_splunk: Extend retrying HTTP status code [Backport 3.1] by @cosmo0920 in #9380
• out_http: Request timed out(408) to be treated as retry [Backport 3.1] by @cosmo0920 in #9379
• out_influxdb: Handle signed/unsigned integer as influx's integer of that representation [Backport 3.1] by @cosmo0920 in #9361
• backport: PR #9338 to 3.1 by @pwhelan in #9390
• 3.1: lib: upgrade cmetrics to v0.9.6 by @edsiper in #9393

Full Changelog: v3.1.7...v3.1.8