refactor: portal conflict checks

[bjwswang]

What type of PR is this?

/kind refactor

What this PR does / why we need it

Which issue(s) this PR fixes

Fixes #273 Fixes #274

Special notes for your reviewer

1. Update Portal status to have two fields to keep confilict status
   • conflictsInEntry
   • conflictsInPath
2. fix the example test

[codecov[bot]]

Codecov Report

Merging #279 (358f1d6) into main (6fdd525) will increase coverage by 0.04%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #279      +/-   ##
==========================================
+ Coverage   16.92%   16.96%   +0.04%     
==========================================
  Files          34       34              
  Lines        3367     3359       -8     
==========================================
  Hits          570      570              
+ Misses       2764     2756       -8     
  Partials       33       33              

Files Changed	Coverage Δ
api/v1alpha1/portal_types.go	100.00% <ø> (ø)
api/v1alpha1/zz_generated.deepcopy.go	0.00% <0.00%> (ø)
controllers/portal_controller.go	0.00% <0.00%> (ø)

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