maint: migrate data sources to tflog structured logging

Replace standard log.Printf calls with tflog.Debug using structured
fields in the following data sources:
- data_source_github_actions_organization_registration_token
- data_source_github_actions_registration_token
- data_source_github_branch

Part of #2629

Author: feyzsari

github/data_source_github_actions_organization_registration_token.go

@@ -2,8 +2,8 @@ package github
 
 import (
 	"context"
-	"log"
 
+	"github.com/hashicorp/terraform-plugin-log/tflog"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
@@ -29,7 +29,9 @@ func dataSourceGithubActionsOrganizationRegistrationTokenRead(ctx context.Contex
 	client := meta.(*Owner).v3client
 	owner := meta.(*Owner).name
 
-	log.Printf("[DEBUG] Creating a GitHub Actions organization registration token for %s", owner)
+	tflog.Debug(ctx, "Creating a GitHub Actions organization registration token", map[string]any{
+		"owner": owner,
+	})
 	token, _, err := client.Actions.CreateOrganizationRegistrationToken(ctx, owner)
 	if err != nil {
 		return diag.Errorf("error creating a GitHub Actions organization registration token for %s: %v", owner, err)

github/data_source_github_actions_registration_token.go

@@ -3,8 +3,8 @@ package github
 import (
 	"context"
 	"fmt"
-	"log"
 
+	"github.com/hashicorp/terraform-plugin-log/tflog"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
@@ -36,7 +36,10 @@ func dataSourceGithubActionsRegistrationTokenRead(ctx context.Context, d *schema
 	owner := meta.(*Owner).name
 	repoName := d.Get("repository").(string)
 
-	log.Printf("[DEBUG] Creating a GitHub Actions repository registration token for %s/%s", owner, repoName)
+	tflog.Debug(ctx, "Creating a GitHub Actions repository registration token", map[string]any{
+		"owner":      owner,
+		"repository": repoName,
+	})
 	token, _, err := client.Actions.CreateRegistrationToken(ctx, owner, repoName)
 	if err != nil {
 		return diag.Errorf("error creating a GitHub Actions repository registration token for %s/%s: %v", owner, repoName, err)

github/data_source_github_branch.go

@@ -3,10 +3,10 @@ package github
 import (
 	"context"
 	"errors"
-	"log"
 	"net/http"
 
 	"github.com/google/go-github/v84/github"
+	"github.com/hashicorp/terraform-plugin-log/tflog"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
@@ -54,7 +54,11 @@ func dataSourceGithubBranchRead(ctx context.Context, d *schema.ResourceData, met
 		var ghErr *github.ErrorResponse
 		if errors.As(err, &ghErr) {
 			if ghErr.Response.StatusCode == http.StatusNotFound {
-				log.Printf("[DEBUG] Missing GitHub branch %s/%s (%s)", orgName, repoName, branchRefName)
+				tflog.Debug(ctx, "Missing GitHub branch", map[string]any{
+					"owner":      orgName,
+					"repository": repoName,
+					"branch_ref": branchRefName,
+				})
 				d.SetId("")
 				return nil
 			}