build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

vendor/google.golang.org/grpc/encoding/gzip/gzip.go

@@ -1,132 +0,0 @@
-/*
- *
- * Copyright 2017 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-// Package gzip implements and registers the gzip compressor
-// during the initialization.
-//
-// # Experimental
-//
-// Notice: This package is EXPERIMENTAL and may be changed or removed in a
-// later release.
-package gzip
-
-import (
-	"compress/gzip"
-	"encoding/binary"
-	"fmt"
-	"io"
-	"sync"
-
-	"google.golang.org/grpc/encoding"
-)
-
-// Name is the name registered for the gzip compressor.
-const Name = "gzip"
-
-func init() {
-	c := &compressor{}
-	c.poolCompressor.New = func() any {
-		return &writer{Writer: gzip.NewWriter(io.Discard), pool: &c.poolCompressor}
-	}
-	encoding.RegisterCompressor(c)
-}
-
-type writer struct {
-	*gzip.Writer
-	pool *sync.Pool
-}
-
-// SetLevel updates the registered gzip compressor to use the compression level specified (gzip.HuffmanOnly is not supported).
-// NOTE: this function must only be called during initialization time (i.e. in an init() function),
-// and is not thread-safe.
-//
-// The error returned will be nil if the specified level is valid.
-func SetLevel(level int) error {
-	if level < gzip.DefaultCompression || level > gzip.BestCompression {
-		return fmt.Errorf("grpc: invalid gzip compression level: %d", level)
-	}
-	c := encoding.GetCompressor(Name).(*compressor)
-	c.poolCompressor.New = func() any {
-		w, err := gzip.NewWriterLevel(io.Discard, level)
-		if err != nil {
-			panic(err)
-		}
-		return &writer{Writer: w, pool: &c.poolCompressor}
-	}
-	return nil
-}
-
-func (c *compressor) Compress(w io.Writer) (io.WriteCloser, error) {
-	z := c.poolCompressor.Get().(*writer)
-	z.Writer.Reset(w)
-	return z, nil
-}
-
-func (z *writer) Close() error {
-	defer z.pool.Put(z)
-	return z.Writer.Close()
-}
-
-type reader struct {
-	*gzip.Reader
-	pool *sync.Pool
-}
-
-func (c *compressor) Decompress(r io.Reader) (io.Reader, error) {
-	z, inPool := c.poolDecompressor.Get().(*reader)
-	if !inPool {
-		newZ, err := gzip.NewReader(r)
-		if err != nil {
-			return nil, err
-		}
-		return &reader{Reader: newZ, pool: &c.poolDecompressor}, nil
-	}
-	if err := z.Reset(r); err != nil {
-		c.poolDecompressor.Put(z)
-		return nil, err
-	}
-	return z, nil
-}
-
-func (z *reader) Read(p []byte) (n int, err error) {
-	n, err = z.Reader.Read(p)
-	if err == io.EOF {
-		z.pool.Put(z)
-	}
-	return n, err
-}
-
-// RFC1952 specifies that the last four bytes "contains the size of
-// the original (uncompressed) input data modulo 2^32."
-// gRPC has a max message size of 2GB so we don't need to worry about wraparound.
-func (c *compressor) DecompressedSize(buf []byte) int {
-	last := len(buf)
-	if last < 4 {
-		return -1
-	}
-	return int(binary.LittleEndian.Uint32(buf[last-4 : last]))
-}
-
-func (c *compressor) Name() string {
-	return Name
-}
-
-type compressor struct {
-	poolCompressor   sync.Pool
-	poolDecompressor sync.Pool
-}