Add a beacon metric to report tasks disabled Jax compilation cache.

[copybara-service[bot]]

Add a beacon metric to report tasks disabled Jax compilation cache.

• Create metric '/jax/compilation_cache/task_disabled_cache' as a beacon metric to monitor tasks which have disabled compilation cache.
• Modified existing logic for reporting the '/jax/compilation_cache/tasks_using_cache' metric and make it easier to find the two adoption related metrics in the code.
• Make the use_compilation_cache variable more accurate.

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[MichaelHudgins]

Closing Copybara created PR due to inactivity