Fix several bugs in relative datetime filters (#22321)

**Changing the granularity of the `Past`/`Next` range picker now changes the granularity of the `Starting from` option**
  - Fixes #22222
  - Reproduces #22222 

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**`Include this quarter` now displays correctly**
  - Fixes #22224 

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**Now shows the correct date preview in `Past`/`Next` range picker**
  - Fixes #22225 
  - Reproduces #22225 

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**Can now change `Past`/`Next` granularity when the value is set to `1`**
  - Fixes #22227
  - Reproduces #22227

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**`Next` relative filter pill text now reads `from now` instead of `ago`**
  - Fixes #22228
  - Reproduces #22228