feat: Loki remote write (#4941)

* chore: add debug loki remote write url

* chore: add decode snappy

* chore: format output

* feature: impl loki remote write

* fix: special labels deserialize

* chore: move result to folder

* chore: finish todo in loki write

* test: loki write

* chore: fix cr issue

* chore: fix cr issue

* chore: fix cr issue

* chore: update pre-commit config

* chore: fix cr issue

Co-authored-by: dennis zhuang <killme2008@gmail.com>

---------

Co-authored-by: dennis zhuang <killme2008@gmail.com>

src/session/src/context.rs

@@ -372,6 +372,7 @@ pub enum Channel {
     Grpc = 6,
     Influx = 7,
     Opentsdb = 8,
+    Loki = 9,
 }
 
 impl From<u32> for Channel {
@@ -385,6 +386,7 @@ impl From<u32> for Channel {
             6 => Self::Grpc,
             7 => Self::Influx,
             8 => Self::Opentsdb,
+            9 => Self::Loki,
 
             _ => Self::Unknown,
         }
@@ -412,6 +414,7 @@ impl Display for Channel {
             Channel::Grpc => write!(f, "grpc"),
             Channel::Influx => write!(f, "influx"),
             Channel::Opentsdb => write!(f, "opentsdb"),
+            Channel::Loki => write!(f, "loki"),
             Channel::Unknown => write!(f, "unknown"),
         }
     }