Make remote cache warning less chatty for missing files (#11976)
Make remote cache warning less chatty for missing files (#11976)

Because the warning had the file digest in it, our aggregation logic did not work.

```
23:47:12.14 [WARN] Failed to read from remote cache (1 occurrences so far): File Digest { hash: Fingerprint<b6862795da00928c83c322abeff8c886086cb8b98c6c250cf56b101c74eb1e1d>, size_bytes: 2030 } did not exist in the store.
23:47:12.14 [WARN] Failed to read from remote cache (1 occurrences so far): File Digest { hash: Fingerprint<8ad86e89dc8138c1d05809502f968b5d017926cb5800baf8f89712950a503d57>, size_bytes: 514 } did not exist in the store.
23:47:12.15 [WARN] Failed to read from remote cache (1 occurrences so far): File Digest { hash: Fingerprint<e49415411d5ee6ac497555b98475851675e80d53e3397685ed743f2bc4cdd629>, size_bytes: 481 } did not exist in the store.
```

However, it does seem useful to know specifically which file was missing, so we log that at the debug level.

[ci skip-build-wheels]
benjyw/pants,benjyw/pants,benjyw/pants,pantsbuild/pants,benjyw/pants,pantsbuild/pants,pantsbuild/pants,pantsbuild/pants,benjyw/pants,pantsbuild/pants,pantsbuild/pants,benjyw/pants,benjyw/pants,pantsbuild/pants