fix: revert mining_node default logging config (#3262)

Description
---
The mining_node relies on its stdout logging for output for the binary and a recent global update to the logging filtered out the debug and info messages to the std out.

This PR updates the default logging config for the mining node so that debug and info messages are logged to stdout.

How Has This Been Tested?
---
Manually

common/logging/log4rs_sample_mining_node.yml

@@ -14,10 +14,6 @@ appenders:
     kind: console
     encoder:
       pattern: "{d(%Y-%m-%d %H:%M:%S.%f)} [{t}] {h({l}):5} {m}{n}"
-    filters:
-      -
-        kind: threshold
-        level: warn
   # An appender named "base_layer" that writes to a file with a custom pattern encoder
   mining_node:
     kind: rolling_file
@@ -37,9 +33,22 @@ appenders:
 
 # Set the default logging level to "warn" and attach the "stdout" appender to the root
 root:
-  level: info
+  level: warn
   appenders:
     - stdout
-    - mining_node
+
+loggers:
+  # mining_node
+  tari::application:
+    level: debug
+    appenders:
+      - mining_node
+    additive: false
+  tari_mining_node:
+    level: debug
+    appenders:
+      - mining_node
+      - stdout
+    additive: false