Oracle web logic14 and oracle java8 dockerfile fixes oca

[caputomarcos]

• Standardized Dockerfile formatting (e.g., uppercase AS in multi-stage builds)
• Fixed minor grammatical issues in comments for clarity
• Improved environment variable definitions with consistent syntax
• Refined system update commands and alternatives configuration for Java binaries
• Removed deprecated Dockerfiles for developer, generic, and slim distributions
• Updated buildDockerImage.sh script for better compatibility with JDK 8/11

This update ensures consistency across the Dockerfiles and improves build stability.

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[rjeberhard]

@caputomarcos, are you able to see the results of the lint check? https://github.com/oracle/docker-images/actions/runs/11417577596/job/32246144244?pr=2884.

We have a job that verifies that common scripting best practices are followed.