only mark status as shrinking when we have something to shrink

[jeffwashington]

Problem

for quite some time, we are logging that we are shrinking many times in a row. This is confusing. When shrinking is a no-op, it would be great if we didn't log we were shrinking.

Summary of Changes

only set the active state for shrinking when we have shrinking to do.

Fixes #

[jeffwashington]

every 100ms:

[2024-08-02T20:09:52.831754728Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:10:45.944124685Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:10:46.117909720Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:10:46.221801874Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:10:46.323405695Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:10:46.554298974Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:10:46.655448371Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:10:46.756989744Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:10:46.858530907Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:11:36.183635962Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:11:36.367785381Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:11:36.472325948Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:11:36.576503676Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:11:36.678902581Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:11:36.916842770Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:11:37.018109622Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:11:37.119392855Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:11:37.221043647Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i
[2024-08-02T20:12:24.891435918Z INFO  solana_metrics::metrics] datapoint: accounts_db_active shrink=1i