Disable DOT in label.

[Shylock-Hg]

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

Description:

Disable DOT character in label, it's meta character in nGQL to represents property lookup.

How do you solve it?

Special notes for your reviewer, ex. impact of this fix, design document, etc:

Checklist:

Tests:

• Unit test(positive and negative cases)
• Function test
• Performance test
• N/A

Affects:

• Documentation affected (Please add the label if documentation needs to be modified.)
• Incompatibility (If it breaks the compatibility, please describe it and add the label.）
• If it's needed to cherry-pick (If cherry-pick to some branches is required, please label the destination version(s).)
• Performance impacted: Consumes more CPU/Memory

Release notes:

Please confirm whether to be reflected in release notes and how to describe:

Disable DOT character in label.

[codecov-commenter]

Codecov Report

Merging #4194 (665b7d7) into master (fba3b18) will increase coverage by 0.00%.
The diff coverage is 61.23%.

@@           Coverage Diff            @@
##           master    #4194    +/-   ##
========================================
  Coverage   84.92%   84.93%            
========================================
  Files        1328     1329     +1     
  Lines      131930   132181   +251     
========================================
+ Hits       112045   112267   +222     
- Misses      19885    19914    +29     

Impacted Files	Coverage Δ
src/graph/context/Iterator.cpp	87.68% <0.00%> (+0.27%)	⬆️
src/storage/query/QueryBaseProcessor.h	100.00% <ø> (ø)
src/graph/visitor/RewriteVisitor.cpp	61.17% <46.36%> (-15.55%)	⬇️
src/storage/query/QueryBaseProcessor-inl.h	84.63% <70.37%> (+0.31%)	⬆️
src/graph/optimizer/rule/PushEFilterDownRule.cpp	78.78% <78.78%> (ø)
src/graph/executor/query/TraverseExecutor.cpp	95.29% <100.00%> (ø)
src/graph/executor/query/TraverseExecutor.h	100.00% <100.00%> (ø)
src/graph/planner/plan/Query.h	96.24% <100.00%> (+0.02%)	⬆️
src/graph/visitor/RewriteVisitor.h	77.77% <100.00%> (ø)
src/kvstore/raftex/RaftPart.cpp	71.49% <100.00%> (-0.49%)	⬇️
... and 46 more

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[Sophie-Xie]

@MuYiYong pls check this incompatible PR, thanks.

[Sophie-Xie]

Merge after PD review

Talked it with fangyang offline, it's OK.