MDEV-4911 - add KILL query id, and add query id information to processlist

It is now possible to kill query by query id. KILL syntax was extended to:
KILL [HARD | SOFT] [CONNECTION | QUERY [ID query_id]] [thread_id | USER user_name]

Added QUERY_ID column to INFORMATION_SCHEMA.PROCESSLIST.

Fixed tests affected by this change:
- added PROCESSLIST.QUERY_ID column
- ID is now keyword and is quoted in SHOW CREATE TABLE output
- PFS statement digest is calculated basing on token id
  (not token text). Token id has shifted for keywords residing
  after ID in keywords array.

sql/lex.h

@@ -262,6 +262,7 @@ static SYMBOL symbols[] = {
   { "HOUR_MICROSECOND",	SYM(HOUR_MICROSECOND_SYM)},
   { "HOUR_MINUTE",	SYM(HOUR_MINUTE_SYM)},
   { "HOUR_SECOND",	SYM(HOUR_SECOND_SYM)},
+  { "ID",               SYM(ID_SYM)},
   { "IDENTIFIED",	SYM(IDENTIFIED_SYM)},
   { "IF",		SYM(IF)},
   { "IGNORE",		SYM(IGNORE_SYM)},