Chore: Refactor CI and add auto cache cleanup mechanisms

1. Refactor the Jenkins file to remove parallel stages.
2. Implement Bazel cache cleanup mechanisms to manage cache size effectively:

• Clean up Bazel caches when the cache size exceeds 30 GB.
• Due to limitations in Bazel, it is not possible to clean up cache based on time.
• Bazel does not provide a built-in method to identify time-based cache contents.
• Searching by modified date is ineffective because the downloaded artifacts are shared between builds and their modified dates are not updated.
• Partial cache removal is avoided to prevent broken caches.
• The implemented approach is to completely remove all caches (similar to bazel clean --expunge) when the cache size threshold is exceeded. This ensures a clean cache environment.