ARROW-11417: Add integration files for buffer compression (#56)

The files were generated using PyArrow 2.0.0.
Then they had to be edited by hand to make them compatible with the Java JSON reader (because of ARROW-11483).
diff --git a/data/arrow-ipc-stream/integration/2.0.0-compression/generated_lz4.arrow_file b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_lz4.arrow_file
new file mode 100644
index 0000000..ac3ba47
--- /dev/null
+++ b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_lz4.arrow_file
Binary files differ
diff --git a/data/arrow-ipc-stream/integration/2.0.0-compression/generated_lz4.json.gz b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_lz4.json.gz
new file mode 100644
index 0000000..86f13ce
--- /dev/null
+++ b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_lz4.json.gz
Binary files differ
diff --git a/data/arrow-ipc-stream/integration/2.0.0-compression/generated_lz4.stream b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_lz4.stream
new file mode 100644
index 0000000..0f5808e
--- /dev/null
+++ b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_lz4.stream
Binary files differ
diff --git a/data/arrow-ipc-stream/integration/2.0.0-compression/generated_zstd.arrow_file b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_zstd.arrow_file
new file mode 100644
index 0000000..1a203b4
--- /dev/null
+++ b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_zstd.arrow_file
Binary files differ
diff --git a/data/arrow-ipc-stream/integration/2.0.0-compression/generated_zstd.json.gz b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_zstd.json.gz
new file mode 100644
index 0000000..0fe818d
--- /dev/null
+++ b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_zstd.json.gz
Binary files differ
diff --git a/data/arrow-ipc-stream/integration/2.0.0-compression/generated_zstd.stream b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_zstd.stream
new file mode 100644
index 0000000..e6cb43d
--- /dev/null
+++ b/data/arrow-ipc-stream/integration/2.0.0-compression/generated_zstd.stream
Binary files differ