Add Go v1.21 and v1.22 to GitHub Actions CI matrix

This change adds Go v1.21 and v1.22 to the CI matrix and drops Go v1.19
and v1.20 since they will no longer be getting updates.

Signed-off-by: Austin Vazquez <macedonv@amazon.com>

Author: austinvazquez

.github/workflows/build-pr.yml

@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        go: [1.19.x, 1.20.x]
+        go: [1.21.x, 1.22.x]
 
     steps:
       - name: checkout source code

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        go: [1.19.x, 1.20.x]
+        go: [1.21.x, 1.22.x]
 
     steps:
       - name: checkout source code