Switch GMA dep from bintray to artifactory. (#2149)

* Switch GMA dep from bintray to artifactory.

Bintray is set for deprecation and EoL in a few months.

We still need bintray for pegasus until restli team migrates off of it.

* tick version to version that should only be on artifactory

build.gradle

@@ -1,6 +1,6 @@
 buildscript {
   ext.junitJupiterVersion = '5.6.1'
-  ext.gmaVersion = '0.2.41'
+  ext.gmaVersion = '0.2.45'
   ext.pegasusVersion = '28.3.7'
 
   apply from: './repositories.gradle'

repositories.gradle

@@ -13,7 +13,10 @@ repositories {
         url "https://plugins.gradle.org/m2/"
     }
     maven {
-        url "https://linkedin.bintray.com/maven/"
+        url "https://linkedin.jfrog.io/artifactory/open-source/" // GMA
+    }
+    maven {
+        url "https://linkedin.bintray.com/maven/" // pegasus
     }
 }