Add standalone version for nebula

[SuperYoko]

What type of PR is this?

• bug
• feature
• enhancement

What does this PR do?

Add nebula standalone version, replace rpc with local function call.

Which issue(s)/PR(s) this PR relates to?

close #3160

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

• compile graphd&storaged into one process
• repalce thrift rpc call with local function call

Additional context:

Checklist：

• Documentation affected （Please add the label if documentation needs to be modified.)
• Incompatible （If it is incompatible, please describe it and add corresponding label.）
• Need to cherry-pick （If need to cherry-pick to some branches, please label the destination version(s).)
• Performance impacted: Consumes more CPU/Memory

Release notes：

Please confirm whether to reflect in release notes and how to describe:

                                                            `

[critical27]

Good job. Very clean.

[codecov-commenter]

Codecov Report

Merging #3310 (9354ff4) into master (99f1f7a) will increase coverage by 0.01%.
The diff coverage is 80.53%.

@@            Coverage Diff             @@
##           master    #3310      +/-   ##
==========================================
+ Coverage   85.19%   85.20%   +0.01%     
==========================================
  Files        1304     1305       +1     
  Lines      121308   121343      +35     
==========================================
+ Hits       103352   103394      +42     
+ Misses      17956    17949       -7     

Impacted Files	Coverage Δ
src/clients/storage/InternalStorageClient.h	100.00% <ø> (ø)
src/clients/storage/StorageClientBase.h	65.57% <ø> (ø)
src/common/thrift/ThriftClientManager-inl.h	89.36% <ø> (+6.38%)	⬆️
src/graph/service/GraphFlags.cpp	100.00% <ø> (ø)
src/graph/validator/MutateValidator.h	100.00% <ø> (ø)
src/kvstore/Listener.cpp	74.05% <ø> (ø)
src/kvstore/plugins/elasticsearch/ESListener.cpp	0.00% <ø> (ø)
src/storage/mutate/AddEdgesProcessor.h	100.00% <ø> (ø)
src/storage/mutate/AddVerticesProcessor.h	100.00% <ø> (ø)
src/webservice/WebService.h	100.00% <ø> (ø)
... and 43 more

---

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[critical27]

Generally LGTM, wait for the performance report

[critical27]

Good job~~

[yixinglu]

LGTM if you have talked about whether to merge the meta server.