Merge branch 'tomas/lint-dbg-and-prints' (#3257)

* tomas/lint-dbg-and-prints:
  changelog: add #3257
  fix lint warnings
  add lints for dbg and prints (except for in tests)

Author: brentstone

.changelog/unreleased/improvements/3257-lint-dbg-and-print.md

@@ -0,0 +1,2 @@
+- Lint for left-over debug and print statements.
+  ([\#3257](https://github.com/anoma/namada/pull/3257))

clippy.toml

@@ -9,3 +9,5 @@ disallowed-methods = [
   { path = "namada_core::time::DateTimeUtc::now", reason = "Do not use current date/time in code that must be deterministic" },
   { path = "wasmtimer::std::Instant", reason = "Do not use current date/time in code that must be deterministic" },
 ]
+allow-dbg-in-tests = true
+allow-print-in-tests = true