sql: fix the pretty-printing of CREATE EXTENSION

Release note: None

pkg/sql/parser/testdata/create_misc

@@ -9,6 +9,14 @@ CREATE EXTENSION bob -- fully parenthesized
 CREATE EXTENSION bob -- literals removed
 CREATE EXTENSION bob -- identifiers removed
 
+parse
+CREATE EXTENSION "a-b"
+----
+CREATE EXTENSION "a-b"
+CREATE EXTENSION "a-b" -- fully parenthesized
+CREATE EXTENSION "a-b" -- literals removed
+CREATE EXTENSION "a-b" -- identifiers removed
+
 parse
 CREATE EXTENSION IF NOT EXISTS bob
 ----

pkg/sql/sem/tree/create.go

@@ -2147,7 +2147,7 @@ func (node *CreateExtension) Format(ctx *FmtCtx) {
 	// do not contain sensitive information and
 	// 2) we want to get telemetry on which extensions
 	// users attempt to load.
-	ctx.WriteString(node.Name)
+	lexbase.EncodeRestrictedSQLIdent(&ctx.Buffer, node.Name, ctx.flags.EncodeFlags())
 }
 
 // CreateExternalConnection represents a CREATE EXTERNAL CONNECTION statement.