Refactor s3select to support parquet. (#7023)

Also handle pretty formatted JSON documents.

buildscripts/go-coverage.sh

@@ -4,7 +4,7 @@ set -e
 echo "" > coverage.txt
 
 for d in $(go list ./... | grep -v browser); do
-    go test -v -coverprofile=profile.out -covermode=atomic "$d"
+    CGO_ENABLED=0 go test -v -coverprofile=profile.out -covermode=atomic "$d"
     if [ -f profile.out ]; then
         cat profile.out >> coverage.txt
         rm profile.out