replace deprecated ioutil import with io

`io/ioutil` has been deprecated since Go 1.16 and this application is
now on Go 1.23, so replacing it with `io` the replacement stable
package.

lib/chatops/rcserver/rcserver.go

@@ -3,7 +3,7 @@ package rcserver
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -44,7 +44,7 @@ func parseAttachment(data string) []Attachment {
 }
 
 func handlePostMessage(w http.ResponseWriter, r *http.Request) {
-	body, _ := ioutil.ReadAll(r.Body)
+	body, _ := io.ReadAll(r.Body)
 	kvs := strings.Split(string(body), "&")
 
 	m := make(map[string]string)

lib/parsers/azure-devops.go

@@ -3,7 +3,7 @@ package parsers
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"strings"
 
 	"github.com/gin-gonic/gin"
@@ -13,7 +13,7 @@ import (
 // parseAzureDevops processes an Azure DevOps webhook, extracting event details such as branch, module name, and repository info.
 // It handles the PushEvent type and marks the data as completed and successful upon successful parsing.
 func (d *Data) parseAzureDevops(c *gin.Context) error {
-	payload, err := ioutil.ReadAll(c.Request.Body)
+	payload, err := io.ReadAll(c.Request.Body)
 	if err != nil {
 		return err
 	}

lib/parsers/gitea.go

@@ -2,7 +2,7 @@ package parsers
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 
 	api "code.gitea.io/gitea/modules/structs"
@@ -17,7 +17,7 @@ func giteaWebhookType(r *http.Request) string {
 // parseGitea processes a Gitea webhook, extracting branch, repository, and user information.
 // Handles "push" events to set relevant fields based on the payload.
 func (d *Data) parseGitea(c *gin.Context) error {
-	payload, err := ioutil.ReadAll(c.Request.Body)
+	payload, err := io.ReadAll(c.Request.Body)
 	if err != nil {
 		return err
 	}

lib/parsers/github.go

@@ -2,7 +2,7 @@ package parsers
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"strings"
 
 	"github.com/gin-gonic/gin"
@@ -12,7 +12,7 @@ import (
 // parseGithub processes a GitHub webhook, extracting branch, repository, and user information.
 // Handles both "push" and "workflow_run" events to set relevant fields based on the payload.
 func (d *Data) parseGithub(c *gin.Context) error {
-	payload, err := ioutil.ReadAll(c.Request.Body)
+	payload, err := io.ReadAll(c.Request.Body)
 	if err != nil {
 		return err
 	}

lib/parsers/gitlab.go

@@ -2,15 +2,15 @@ package parsers
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"strings"
 
 	"github.com/gin-gonic/gin"
 	"github.com/xanzy/go-gitlab"
 )
 
 func (d *Data) parseGitlab(c *gin.Context) error {
-	payload, err := ioutil.ReadAll(c.Request.Body)
+	payload, err := io.ReadAll(c.Request.Body)
 	if err != nil {
 		return err
 	}