Improve statsmodels autologging metrics (mlflow#4942)

* init

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* update

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* update

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* fix lint

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* update

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* fix lint

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* fix lint

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* fix lint

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* update

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* update

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* update

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* emit_warning_only in autolog

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* add tests for bad metric warning

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* fix

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* update

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* update

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

* update

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>
Signed-off-by: westford14 <westford14@gmail.com>