feat(meta): introduce user service in meta, to support user and privilege management

[yezizp2012]

What's changed and what's your intention?

As title.

Please explain IN DETAIL what the changes are in this PR and why they are needed:

• Summarize your change (mandatory)
• How does this PR work? Need a brief introduction for the changed logic (optional)
• Describe clearly one logical change and avoid lazy messages (optional)
• Describe any limitations of the current code (optional)
• Add the 'user-facing changes' label if your PR contains changes that are visibile to users (optional)

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

Part of #2193 #2643

[codecov]

Codecov Report

Merging #2745 (c7e732d) into main (e33de50) will decrease coverage by 0.05%.
The diff coverage is 61.95%.

@@            Coverage Diff             @@
##             main    #2745      +/-   ##
==========================================
- Coverage   72.69%   72.64%   -0.06%     
==========================================
  Files         702      705       +3     
  Lines       91948    92466     +518     
==========================================
+ Hits        66845    67168     +323     
- Misses      25103    25298     +195     

Flag	Coverage Δ
rust	72.64% <61.95%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/common/src/catalog/mod.rs	56.25% <ø> (ø)
src/meta/src/manager/catalog.rs	19.08% <0.00%> (-0.92%)	⬇️
src/meta/src/model/mod.rs	99.05% <ø> (ø)
src/meta/src/rpc/server.rs	0.00% <0.00%> (ø)
src/meta/src/rpc/service/mod.rs	0.00% <ø> (ø)
src/meta/src/rpc/service/user_service.rs	0.00% <0.00%> (ø)
src/meta/src/model/user.rs	75.00% <75.00%> (ø)
src/meta/src/manager/user.rs	87.25% <87.25%> (ø)
src/meta/src/model/barrier.rs	78.57% <0.00%> (-3.58%)	⬇️
src/common/src/types/ordered_float.rs	24.70% <0.00%> (-0.20%)	⬇️
... and 1 more

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[fuyufjh]

Good job! Generally LGTM