fix(element): fix portal destroy

[muuyao]

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What have you changed?

fix portal destroy

[codecov]

Codecov Report

Merging #1898 (97e41fb) into formily_next (48f574e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@              Coverage Diff              @@
##           formily_next    #1898   +/-   ##
=============================================
  Coverage         92.70%   92.71%           
=============================================
  Files               136      136           
  Lines              6114     6121    +7     
  Branches           1520     1471   -49     
=============================================
+ Hits               5668     5675    +7     
  Misses              442      442           
  Partials              4        4           

Impacted Files	Coverage Δ
packages/core/src/models/ArrayField.ts	100.00% <100.00%> (ø)
packages/core/src/models/Field.ts	99.21% <100.00%> (+<0.01%)	⬆️
packages/core/src/models/Form.ts	99.69% <100.00%> (ø)
packages/core/src/models/VoidField.ts	100.00% <100.00%> (ø)
packages/core/src/shared/internals.ts	95.77% <100.00%> (-0.03%)	⬇️

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