Add Support for relative time values for time filters

**Is your feature request related to a problem? Please describe.**
For `timeDimensions` we are able to specify relative values such as `dateRange: 'Last 7 days'`. It would be ideal if we were able to specify relative values for `time` `filters` as well.

**Describe the solution you'd like**
To be able to define relative values such as `'Last 7 days'` in both `inDateRange` and `notInDateRange`: https://cube.dev/docs/query-format#filters-operators-in-date-range and https://cube.dev/docs/query-format#filters-operators-not-in-date-range

**Additional context**
Previous relevant discussion: https://github.com/cube-js/cube.js/issues/1737