fix(pageserver): avoid flooding gc-compaction logs (#11024)

## Problem

The "did not trigger" gets logged at 10k/minute in staging.

## Summary of changes

Change it to debug level.

Signed-off-by: Alex Chi Z <chi@neon.tech>

pageserver/src/tenant/timeline/compaction.rs

@@ -321,7 +321,7 @@ impl GcCompactionQueue {
                 l1_size, l2_size, l2_lsn, gc_cutoff
             );
         } else {
-            info!(
+            debug!(
                 "did not trigger auto gc-compaction: l1_size={}, l2_size={}, l2_lsn={}, gc_cutoff={}",
                 l1_size, l2_size, l2_lsn, gc_cutoff
             );