chore: deprecate java1.8 al1

[jeromevdl]

Issue #, if available:

Description of changes:

• Remove java8 from sam examples: Error: Building functions with java8 is no longer supported

Checklist

• Meet tenets criteria
• Update tests
• Update docs
• PR title follows conventional commit semantics

Breaking change checklist

RFC issue #:

• Migration process documented
• Implement warnings (if it can live side by side)

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

💾 Artifacts Size Report

Module	Version	Size (KB)
powertools-core	1.19.0-SNAPSHOT	9.95
powertools-serialization	1.19.0-SNAPSHOT	17.93
powertools-logging	1.19.0-SNAPSHOT	45.83
powertools-tracing	1.19.0-SNAPSHOT	13.47
powertools-sqs	1.19.0-SNAPSHOT	29.02
powertools-metrics	1.19.0-SNAPSHOT	14.30
powertools-parameters	1.19.0-SNAPSHOT	41.09
powertools-validation	1.19.0-SNAPSHOT	18.91
powertools-cloudformation	1.19.0-SNAPSHOT	16.83
powertools-idempotency	1.19.0-SNAPSHOT	43.51
powertools-large-messages	1.19.0-SNAPSHOT	17.67
powertools-batch	1.19.0-SNAPSHOT	16.89