Apply meta_server-tag from default/override create parameters early in create #1066
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Description
This PR adds early handling of any meta_server-tag parameter found in DEFAULT_CREATE_PARAMS /OVERRIDE_CREATE_PARAMS or the respective tenantSettings to the create call procedure. This is necessary to ensure the parameter has the desired effect on server selection, which occurs way before the passed create parameters are merged with configured parameters usually.
In the later occurring merging of parameters, the meta_server-tag is then excluded, to maintain the fact that the final meta_server-tag parameter is always equal to the chosen server's tag.
This PR is required to make my suggestion in #1053 actually work.
Testing Steps
Tested combinations of passed vs. configured meta_server-tag via API Mate.
Other notes
At a first glance, e.g. meta_lrs parameters would also require this treatment. I wonder if it would be better to handle all meta parameters early.