feat: implement ListSeedPeers feature in manager

[gaius-qi]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Merging #2865 (5f617f6) into main (39a15e1) will decrease coverage by 0.19%.
Report is 3 commits behind head on main.
The diff coverage is 6.97%.

@@            Coverage Diff             @@
##             main    #2865      +/-   ##
==========================================
- Coverage   51.53%   51.35%   -0.19%     
==========================================
  Files         162      161       -1     
  Lines       21851    21931      +80     
==========================================
  Hits        11262    11262              
- Misses       9922    10005      +83     
+ Partials      667      664       -3     

Flag	Coverage Δ
Object-compatibility-e2etests	?
e2etests	?
unittests	51.35% <6.97%> (-0.19%)	⬇️

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

Files	Coverage Δ
pkg/redis/redis.go	75.00% <100.00%> (+0.92%)	⬆️
scheduler/scheduling/scheduling.go	84.65% <100.00%> (ø)
scheduler/service/service_v2.go	84.89% <100.00%> (ø)
manager/rpcserver/manager_server_v1.go	0.00% <0.00%> (ø)
manager/rpcserver/manager_server_v2.go	0.00% <0.00%> (ø)

... and 3 files with indirect coverage changes