chore(cpp): Update update cache sample and add ttl option

[bajajneha27]

No description provided.

[gemini-code-assist]

Summary of Changes

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This pull request updates a C++ sample for Google Cloud Storage Control to reflect a change in how AnywhereCache properties are modified. The sample now illustrates updating the Time To Live (TTL) for a cache, providing a more relevant example for cache management.

Highlights

• Sample Update: Modified the UpdateAnywhereCache sample to demonstrate updating the ttl (Time To Live) field of an AnywhereCache instead of the admission_policy.

Changelog

• google/cloud/storagecontrol/v2/samples/storage_control_anywhere_cache_samples.cc
  • Updated the UpdateAnywhereCache function to modify the ttl field instead of the admission_policy.
  • Changed the FieldMask to target the ttl field.
  • Set the ttl to 86400 seconds (1 day).

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[gemini-code-assist]

Code Review

This pull request updates the UpdateAnywhereCache sample to demonstrate updating the ttl field. My review found a critical compilation error due to incorrect operator usage on a stack-allocated object. I've provided a code suggestion to fix this. I also noted that a function parameter has become unused as a result of these changes and should be removed for code clarity.

[gemini-code-assist]

The cache object is a value type, not a pointer. You should use the . operator to access its members instead of ->. Using the arrow operator here will cause a compilation error.

Additionally, with this change, the admission_policy parameter is no longer used. Consider removing it from the function signature to avoid compiler warnings and improve code clarity.

    cache.mutable_ttl()->set_seconds(86400);

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.64%. Comparing base (eea3715) to head (11d9ab9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16032      +/-   ##
==========================================
- Coverage   92.64%   92.64%   -0.01%     
==========================================
  Files        2335     2335              
  Lines      214792   214792              
==========================================
- Hits       198986   198985       -1     
- Misses      15806    15807       +1     

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