Move iter_with_drain to nursery

clippy_lints/src/lib.register_all.rs

@@ -166,7 +166,6 @@ store.register_group(true, "clippy::all", Some("clippy_all"), vec![
     LintId::of(methods::ITER_NTH_ZERO),
     LintId::of(methods::ITER_OVEREAGER_CLONED),
     LintId::of(methods::ITER_SKIP_NEXT),
-    LintId::of(methods::ITER_WITH_DRAIN),
     LintId::of(methods::MANUAL_FILTER_MAP),
     LintId::of(methods::MANUAL_FIND_MAP),
     LintId::of(methods::MANUAL_SATURATING_ARITHMETIC),

clippy_lints/src/lib.register_nursery.rs

@@ -13,6 +13,7 @@ store.register_group(true, "clippy::nursery", Some("clippy_nursery"), vec![
     LintId::of(future_not_send::FUTURE_NOT_SEND),
     LintId::of(index_refutable_slice::INDEX_REFUTABLE_SLICE),
     LintId::of(let_if_seq::USELESS_LET_IF_SEQ),
+    LintId::of(methods::ITER_WITH_DRAIN),
     LintId::of(missing_const_for_fn::MISSING_CONST_FOR_FN),
     LintId::of(mutable_debug_assertion::DEBUG_ASSERT_WITH_MUT_CALL),
     LintId::of(mutex_atomic::MUTEX_ATOMIC),

clippy_lints/src/lib.register_perf.rs

@@ -16,7 +16,6 @@ store.register_group(true, "clippy::perf", Some("clippy_perf"), vec![
     LintId::of(methods::EXTEND_WITH_DRAIN),
     LintId::of(methods::ITER_NTH),
     LintId::of(methods::ITER_OVEREAGER_CLONED),
-    LintId::of(methods::ITER_WITH_DRAIN),
     LintId::of(methods::MANUAL_STR_REPEAT),
     LintId::of(methods::OR_FUN_CALL),
     LintId::of(methods::SINGLE_CHAR_PATTERN),

clippy_lints/src/methods/mod.rs

@@ -1140,7 +1140,7 @@ declare_clippy_lint! {
     /// ```
     #[clippy::version = "1.61.0"]
     pub ITER_WITH_DRAIN,
-    perf,
+    nursery,
     "replace `.drain(..)` with `.into_iter()`"
 }