Add new SQL parser to support S3 Select syntax (#7102)

- New parser written from scratch, allows easier and complete parsing
  of the full S3 Select SQL syntax. Parser definition is directly
  provided by the AST defined for the SQL grammar.

- Bring support to parse and interpret SQL involving JSON path
  expressions; evaluation of JSON path expressions will be
  subsequently added.

- Bring automatic type inference and conversion for untyped
  values (e.g. CSV data).

vendor/github.com/alecthomas/participle/api.go

@@ -0,0 +1,19 @@
+package participle
+
+import (
+	"github.com/alecthomas/participle/lexer"
+)
+
+// Capture can be implemented by fields in order to transform captured tokens into field values.
+type Capture interface {
+	Capture(values []string) error
+}
+
+// The Parseable interface can be implemented by any element in the grammar to provide custom parsing.
+type Parseable interface {
+	// Parse into the receiver.
+	//
+	// Should return NextMatch if no tokens matched and parsing should continue.
+	// Nil should be returned if parsing was successful.
+	Parse(lex lexer.PeekingLexer) error
+}