docs(deployment): use flowchart to illustrate deployment architecture in different scenes

[Anilople]

What's the purpose of this PR

Add more document.

Use flowchart to illustrate deployment architecture in different scenes

Which issue(s) this PR fixes:

None

Brief changelog

• Add a new link to sidebar.
• Create 2 new markdown files deployment-architecture.md.

An example of flowchart

More flowchart in https://anilople.github.io/apollo/#/zh/deployment/deployment-architecture

Follow this checklist to help us incorporate your contribution quickly and easily:

• Read the Contributing Guide before making this pull request.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit tests to verify the code.
• Run mvn clean test to make sure this pull request doesn't break anything.
• Update the CHANGES log.

[Anilople]

Will done soon or left to another pull request.

[Anilople]

Is it reasonable to put the deployment architecture document here? Or move to another place?

[nobodyiam]

Is it reasonable to put the deployment architecture document here? Or move to another place?

Is it better to put it in Distributed Deployment Guide - 1.3 Environment section?
Or if it is too long to be put there, then we could have a link to this document?

[codecov-commenter]

Codecov Report

Merging #4017 (127fa0a) into master (8484178) will increase coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #4017      +/-   ##
============================================
+ Coverage     51.46%   51.49%   +0.03%     
- Complexity     2524     2531       +7     
============================================
  Files           484      484              
  Lines         14798    14839      +41     
  Branches       1532     1537       +5     
============================================
+ Hits           7616     7642      +26     
- Misses         6652     6666      +14     
- Partials        530      531       +1     

Impacted Files	Coverage Δ
...work/apollo/biz/message/DatabaseMessageSender.java	50.00% <0.00%> (-14.59%)	⬇️
...internals/provider/DefaultApplicationProvider.java	49.16% <0.00%> (-2.84%)	⬇️
...ework/apollo/internals/RemoteConfigRepository.java	88.34% <0.00%> (-1.04%)	⬇️
...ramework/apollo/openapi/util/OpenApiBeanUtils.java	8.82% <0.00%> (-0.14%)	⬇️
...work/apollo/common/dto/GrayReleaseRuleItemDTO.java	0.00% <0.00%> (ø)
...rk/foundation/internals/provider/NullProvider.java	0.00% <0.00%> (ø)
...apollo/openapi/dto/OpenGrayReleaseRuleItemDTO.java	0.00% <0.00%> (ø)
...ring/boot/ApolloApplicationContextInitializer.java	94.33% <0.00%> (ø)
...llo/configservice/controller/ConfigController.java	95.29% <0.00%> (ø)
...configservice/controller/ConfigFileController.java	83.47% <0.00%> (ø)
... and 4 more

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[nobodyiam]

LGTM