Move SQL 2019 extension's notebook code into Azure Data Studio (#4090)

extensions/notebook/kernels/pyspark3kernel/kernel.json

@@ -0,0 +1,10 @@
+{
+	"argv": [
+		"python",
+		"-m",
+		"sparkmagic.kernels.pyspark3kernel.pyspark3kernel",
+		"-f",
+		"{connection_file}"
+	],
+	"display_name": "PySpark3"
+}

extensions/notebook/kernels/pysparkkernel/kernel.json

@@ -0,0 +1,10 @@
+{
+	"argv": [
+		"python",
+		"-m",
+		"sparkmagic.kernels.pysparkkernel.pysparkkernel",
+		"-f",
+		"{connection_file}"
+	],
+	"display_name": "PySpark"
+}

extensions/notebook/kernels/sparkkernel/kernel.json

@@ -0,0 +1,10 @@
+{
+	"argv": [
+		"python",
+		"-m",
+		"sparkmagic.kernels.sparkkernel.sparkkernel",
+		"-f",
+		"{connection_file}"
+	],
+	"display_name": "Spark | Scala"
+}

extensions/notebook/kernels/sparkrkernel/kernel.json

@@ -0,0 +1,10 @@
+{
+	"argv": [
+		"python",
+		"-m",
+		"sparkmagic.kernels.sparkrkernel.sparkrkernel",
+		"-f",
+		"{connection_file}"
+	],
+	"display_name": "Spark | R"
+}