plugin: temporarily hide warning about using plugins using the old API (

#4002)

Co-authored-by: Simon Sawert <simon@sawert.se>

pkg/lint/lintersdb/custom_linters.go

@@ -2,6 +2,7 @@ package lintersdb
 
 import (
 	"fmt"
+	"os"
 	"path/filepath"
 	"plugin"
 
@@ -115,8 +116,11 @@ func (m *Manager) lookupAnalyzerPlugin(plug *plugin.Plugin) ([]*analysis.Analyze
 		return nil, err
 	}
 
-	m.log.Warnf("plugin: 'AnalyzerPlugin' plugins are deprecated, please use the new plugin signature: " +
-		"https://golangci-lint.run/contributing/new-linters/#create-a-plugin")
+	// TODO(ldez): remove this env var (but keep the log) in the next minor version (v1.55.0)
+	if _, ok := os.LookupEnv("GOLANGCI_LINT_HIDE_WARNING_ABOUT_PLUGIN_API_DEPRECATION"); !ok {
+		m.log.Warnf("plugin: 'AnalyzerPlugin' plugins are deprecated, please use the new plugin signature: " +
+			"https://golangci-lint.run/contributing/new-linters/#create-a-plugin")
+	}
 
 	analyzerPlugin, ok := symbol.(AnalyzerPlugin)
 	if !ok {