Reduce deprecation logging severity for settings that are not removed in 8.0

[jakelandis]

This commit lowers the severity for all settings from critical to warning
for all settings that are still present in 8.0.0.

releated #79107

===

Note - I have requested review from @tvernum and @jbaiera since these settings are mostly from areas for which they are familiar. Please add others for review if needed.
cc: @masseyke @rjernst @pgomulka

===
Note this settings were identified by introducing the following debug code in 8.0.0 and 7.16 and comparing the two lists. If the same setting showed up as deprecated in both 7.16 and 8.0.0 it is included in this PR. If the setting was missing in 8.0.0, no changes since the default is critical.

diff --git a/server/src/main/java/org/elasticsearch/common/settings/Setting.java b/server/src/main/java/org/elasticsearch/common/settings/Setting.java
index a56baf6cf3b..8a23f9ce906 100644
--- a/server/src/main/java/org/elasticsearch/common/settings/Setting.java
+++ b/server/src/main/java/org/elasticsearch/common/settings/Setting.java
@@ -161,6 +161,12 @@ public class Setting<T> implements ToXContentObject {
         this.defaultValue = defaultValue;
         this.parser = parser;
         this.validator = validator;
+        if(Arrays.stream(properties).filter(p -> p.equals(Property.Deprecated) || p.equals(Property.DeprecatedWarning)).count() > 0){
+                       System.out.println("**deprecated setting: " + key +
+                           (Arrays.stream(properties).filter( p -> p.equals(Property.DeprecatedWarning)).count() > 0 ? "(warning)" : ""));
+
+
+                    }
         if (properties == null) {
             throw new IllegalArgumentException("properties cannot be null for setting [" + key + "]");
         }

[elasticmachine]

Pinging @elastic/es-core-infra (Team:Core/Infra)

[jbaiera]

LGTM on the monitoring changes, though I think just one got missed

[jbaiera]

I think this one should be at warning level as well?

[jakelandis]

That setting was removed in 8.x, so it should remain critical level .

[tvernum]

LGTM.
In a few months we should have a conversation about what the deprecation lifecycle looks like and how setting attributes should work with that. But not now.

[jakelandis]

@elasticmachine update branch