[release] 1.25.0 - refac: Refactor grpc with generated java (#350)

### Improvements
- Refactor grpc using generated java file instead of kotlin since java
is better maintained.






>Included In This Release
>- bb49206 Xin Li
> - refactor: Use java generated file instead of kotlin to remove
dependency (#349)

gradle.properties

@@ -7,7 +7,7 @@ SONATYPE_AUTOMATIC_RELEASE=true
 
 GROUP=com.statsig.serversdk
 POM_ARTIFACT_ID=serversdk
-VERSION_NAME=1.24.1
+VERSION_NAME=1.25.0
 
 POM_NAME=Statsig Server SDK
 POM_DESCRIPTION=A feature gating and a/b testing library for statsig

src/main/kotlin/com/statsig/sdk/StatsigMetadata.kt

@@ -4,7 +4,7 @@ import com.google.gson.annotations.SerializedName
 import java.util.Properties
 import java.util.UUID
 
-private const val VERSION = "1.24.1"
+private const val VERSION = "1.25.0"
 
 internal data class StatsigMetadata(@SerializedName("sdkType") var sdkType: String = "java-server", @SerializedName("sessionID") var sessionID: String = UUID.randomUUID().toString(), @SerializedName("languageVersion") var languageVersion: String = System.getProperty("java.version"), @SerializedName("exposureLoggingDisabled") var exposureLoggingDisabled: Boolean? = null) {
     @SerializedName("sdkVersion")