- cost_tracker is data member of a bank, it can report metrics when bank is frozen (#20802)

- removed cost_tracker_stats and histogram
- move stats reporting outside of bank freeze

programs/bpf/Cargo.lock

@@ -1112,12 +1112,6 @@ dependencies = [
  "pkg-config",
 ]
 
-[[package]]
-name = "histogram"
-version = "0.6.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12cb882ccb290b8646e554b157ab0b71e64e8d5bef775cd66b6531e52d302669"
-
 [[package]]
 name = "hmac"
 version = "0.8.1"
@@ -3249,7 +3243,6 @@ dependencies = [
  "dir-diff",
  "flate2",
  "fnv",
- "histogram",
  "itertools 0.10.1",
  "lazy_static",
  "log",