Merge pull request prometheus#17353 from roidelapluie/anchored_smoothed_name_label

promql: allow 'anchored' and 'smoothed' as metric and label names

Author: juliusv

promql/parser/generated_parser.y

@@ -696,7 +696,7 @@ metric          : metric_identifier label_set
                 ;
 
 
-metric_identifier: AVG | BOTTOMK | BY | COUNT | COUNT_VALUES | GROUP | IDENTIFIER |  LAND | LOR | LUNLESS | MAX | METRIC_IDENTIFIER | MIN | OFFSET | QUANTILE | STDDEV | STDVAR | SUM | TOPK | WITHOUT | START | END | LIMITK | LIMIT_RATIO | STEP;
+metric_identifier: AVG | BOTTOMK | BY | COUNT | COUNT_VALUES | GROUP | IDENTIFIER |  LAND | LOR | LUNLESS | MAX | METRIC_IDENTIFIER | MIN | OFFSET | QUANTILE | STDDEV | STDVAR | SUM | TOPK | WITHOUT | START | END | LIMITK | LIMIT_RATIO | STEP | ANCHORED | SMOOTHED;
 
 label_set       : LEFT_BRACE label_set_list RIGHT_BRACE
                         { $$ = labels.New($2...) }
@@ -953,7 +953,7 @@ counter_reset_hint : UNKNOWN_COUNTER_RESET | COUNTER_RESET | NOT_COUNTER_RESET |
 aggregate_op    : AVG | BOTTOMK | COUNT | COUNT_VALUES | GROUP | MAX | MIN | QUANTILE | STDDEV | STDVAR | SUM | TOPK | LIMITK | LIMIT_RATIO;
 
 // Inside of grouping options label names can be recognized as keywords by the lexer. This is a list of keywords that could also be a label name.
-maybe_label     : AVG | BOOL | BOTTOMK | BY | COUNT | COUNT_VALUES | GROUP | GROUP_LEFT | GROUP_RIGHT | IDENTIFIER | IGNORING | LAND | LOR | LUNLESS | MAX | METRIC_IDENTIFIER | MIN | OFFSET | ON | QUANTILE | STDDEV | STDVAR | SUM | TOPK | START | END | ATAN2 | LIMITK | LIMIT_RATIO | STEP;
+maybe_label     : AVG | BOOL | BOTTOMK | BY | COUNT | COUNT_VALUES | GROUP | GROUP_LEFT | GROUP_RIGHT | IDENTIFIER | IGNORING | LAND | LOR | LUNLESS | MAX | METRIC_IDENTIFIER | MIN | OFFSET | ON | QUANTILE | STDDEV | STDVAR | SUM | TOPK | START | END | ATAN2 | LIMITK | LIMIT_RATIO | STEP | ANCHORED | SMOOTHED;
 
 unary_op        : ADD | SUB;