refactor: replace x/exp/slices with stdlib slices (#39838)

Go 1.21 added slices package to stdlib. Replace usage of x/exp/slices
with slices and drop x/exp dependency.

NOTICE.txt

@@ -25187,43 +25187,6 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
---------------------------------------------------------------------------------
-Dependency : golang.org/x/exp
-Version: v0.0.0-20231127185646-65229373498e
-Licence type (autodetected): BSD-3-Clause
---------------------------------------------------------------------------------
-
-Contents of probable licence file $GOMODCACHE/golang.org/x/exp@v0.0.0-20231127185646-65229373498e/LICENSE:
-
-Copyright (c) 2009 The Go Authors. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
 --------------------------------------------------------------------------------
 Dependency : golang.org/x/lint
 Version: v0.0.0-20210508222113-6edffad5e616
@@ -55098,6 +55061,43 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 
+--------------------------------------------------------------------------------
+Dependency : golang.org/x/exp
+Version: v0.0.0-20231127185646-65229373498e
+Licence type (autodetected): BSD-3-Clause
+--------------------------------------------------------------------------------
+
+Contents of probable licence file $GOMODCACHE/golang.org/x/exp@v0.0.0-20231127185646-65229373498e/LICENSE:
+
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
 --------------------------------------------------------------------------------
 Dependency : golang.org/x/term
 Version: v0.19.0

go.mod

@@ -232,7 +232,6 @@ require (
 	go.elastic.co/apm/module/apmhttp/v2 v2.6.0
 	go.elastic.co/apm/v2 v2.6.0
 	go.mongodb.org/mongo-driver v1.5.1
-	golang.org/x/exp v0.0.0-20231127185646-65229373498e
 	golang.org/x/tools/go/vcs v0.1.0-deprecated
 	google.golang.org/genproto/googleapis/api v0.0.0-20230913181813-007df8e322eb
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
@@ -388,6 +387,7 @@ require (
 	go.opentelemetry.io/otel v1.24.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
+	golang.org/x/exp v0.0.0-20231127185646-65229373498e // indirect
 	golang.org/x/term v0.19.0 // indirect
 	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
 	google.golang.org/appengine v1.6.7 // indirect

x-pack/filebeat/input/salesforce/input.go

@@ -14,6 +14,7 @@ import (
 	"io"
 	"net/http"
 	"os"
+	"slices"
 	"time"
 
 	"github.com/g8rswimmer/go-sfdc"
@@ -23,7 +24,6 @@ import (
 	"github.com/golang-jwt/jwt/v5"
 	"github.com/hashicorp/go-retryablehttp"
 	"go.uber.org/zap"
-	"golang.org/x/exp/slices"
 
 	v2 "github.com/elastic/beats/v7/filebeat/input/v2"
 	inputcursor "github.com/elastic/beats/v7/filebeat/input/v2/input-cursor"