[bugfix] correct update restfulapi in ctl

[benja-wu]

• Fixing bug introducing by improve egctl to support sending multi configs at once (fix #29) #230
• Update type RESTful API should use PUT method with object name in URL.

[megaeasex]

[TASK:easegress-pr-test SUCCESS]megaease/easegress Pull Request 249 Deploy Test Success

[codecov-commenter]

Codecov Report

Merging #249 (df21283) into main (8906c94) will decrease coverage by 0.12%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #249      +/-   ##
==========================================
- Coverage   80.24%   80.12%   -0.13%     
==========================================
  Files          44       44              
  Lines        4835     4835              
==========================================
- Hits         3880     3874       -6     
- Misses        735      740       +5     
- Partials      220      221       +1     

Impacted Files	Coverage Δ
pkg/cluster/cluster.go	48.76% <0.00%> (-1.06%)	⬇️

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[xxx7xxxx]

Use egctl, need to merge right now.