Fixes #14524

Adds an option to set the text alignment of a column (left/right/center)

Behavior

• Can be set for every column
• As long as the user didn't specify an alignment, it is right aligned for numbers, left aligned for the rest
• If the column data type changes, the alignment changes as well as long as the user didn't manually pick an alignment
• Once the user picked an alignment once, it sticks, even if the column type changes later on
• It's not possible to get back into the original "auto" mode without removing the dimension

Data grid has a bug with vertical scroll bars which becomes super obvious when implementing this feature. elastic/eui#4468 should take care of this, but this PR shouldn't be merged if it's not clear the EUI fix will be in the same version.