* promql: Move tests to testutil
Signed-off-by: Alex Dzyoba <alex@dzyoba.com>
* promql: Match error type via errors.As in tests
Signed-off-by: Alex Dzyoba <alex@dzyoba.com>
* promql: Remove unused `expectedList` func from lex_test.go
Signed-off-by: Alex Dzyoba <alex@dzyoba.com>