fixes #20681; add efSkipFieldVisibilityCheck to skip check

[ringabout]

fixes #20681

Constant object construction has been checked and inlined already, there is no need to sem it again, especially for default fields.

fixes

import std/tables
block:
  type TokenData = object
    campaignMemberships = Table[string, string]()

  let x = default(TokenData)
  doAssert x.campaignMemberships.len == 0

[ringabout]

It seems that there is probably nothing wrong with this patch.

I have spent a bad time debugging the macros of loopfusion, I think these changes may work.

With this patch, the type of tySequence is not erased for nkBracket, which causes loopfusion to stop working.

Am I correct or do I miss something?

[ringabout]

wait for #20662

[github-actions]

Thanks for your hard work on this PR!
The lines below are statistics of the Nim compiler built from 141abb7

Hint: mm: orc; opt: speed; options: -d:release
164440 lines; 9.829s; 613.664MiB peakmem