feat(meta): add compaction group service/client

[zwang28]

What's changed and what's your intention?

Add CompactionGroupClient. It fetches and caches compaction group info from meta service.
It will be used by both compute node and compactor node later.

Checklist

• All checks passed in ./risedev check (or alias, ./risedev c)

Refer to a related PR or issue link (optional)

#2065

[codecov]

Codecov Report

Merging #3061 (ecfc526) into main (9ae9973) will decrease coverage by 0.05%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #3061      +/-   ##
==========================================
- Coverage   73.47%   73.42%   -0.06%     
==========================================
  Files         735      736       +1     
  Lines      100477   100552      +75     
==========================================
- Hits        73827    73826       -1     
- Misses      26650    26726      +76     

Flag	Coverage Δ
rust	73.42% <0.00%> (-0.06%)	⬇️

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

Impacted Files	Coverage Δ
src/meta/src/hummock/mock_hummock_meta_client.rs	42.39% <0.00%> (-1.43%)	⬇️
src/meta/src/rpc/server.rs	0.00% <0.00%> (ø)
src/meta/src/rpc/service/hummock_service.rs	0.00% <0.00%> (ø)
src/rpc_client/src/meta_client.rs	0.00% <0.00%> (ø)
src/storage/src/hummock/compaction_group_client.rs	0.00% <0.00%> (ø)
src/storage/src/hummock/hummock_meta_client.rs	0.00% <0.00%> (ø)
src/storage/src/hummock/mod.rs	85.52% <ø> (ø)
src/meta/src/barrier/mod.rs	69.13% <0.00%> (-0.33%)	⬇️

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[hzxa21]

Rest LGTM.

[hzxa21]

Return Option<CompactionGroupId> instead?