Sync karafka-rdkafka testing pipeline with trixie

[mensfeld]

this PR aligns the testing and quality complementary pipelines between rdkafka and the karafka fork

[Copilot]

Pull Request Overview

This PR aligns the testing and quality complementary pipelines between rdkafka and the karafka fork by introducing SSL testing capabilities, improving build scripts with symbol export controls, and establishing comprehensive CI workflows.

• Adds SSL certificate generation and Docker Compose SSL configuration for testing encrypted connections
• Improves build scripts with symbol export maps to limit exposed symbols in precompiled libraries
• Introduces complementary CI workflows for extended testing across multiple distributions and architectures

Reviewed Changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
ext/generate-ssl-certs.sh	Adds script to generate SSL certificates for Kafka testing
ext/build_*.sh	Updates build scripts with symbol export controls and library improvements
docker-compose-ssl.yml	Adds Docker Compose configuration for SSL-enabled Kafka testing
.github/workflows/ci_*.yml	Updates CI workflows with SSL testing and adds complementary testing pipelines
ext/build_common.sh	Updates librdkafka version and improves source distribution handling
CHANGELOG.md	Documents new features and improvements

Comments suppressed due to low confidence (4)

ext/build_linux_aarch64_gnu.sh:268

• This line appears to be incorrectly prefixed with spaces and a minus sign, making it unreachable code. It should be removed as the corrected version follows on line 279.

# Write the export map

ext/build_common.sh:360

• This commented-out line appears to be incorrectly prefixed with spaces and a minus sign, making it unreachable code. It should be removed completely since it's been replaced by the MIT mirror URL.

    # Using MIT mirror since kerberos.org is down

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