fix(runtime): expose all autocli services, not just the last

[riba2534]

Description

Fixes #26469

autocliServiceRegistrar stored a single serviceName and overwrote it on every RegisterService call. A module that registers more than one msg or query service therefore had all but the last service silently dropped from the AutoCLI command tree.

The ServiceCommandDescriptor proto already supports this: service may be left empty when sub_commands are used for modules with multiple tx/query services. This wires the registrar up to that support.

Change

• Accumulate every registered service name instead of keeping only the last.
• Build the descriptor via newServiceCommandDescriptor: first service stays primary (single-service modules unchanged); additional services become sub-commands keyed by lowercased short name, falling back to the fully qualified name on collision.

Testing

go test ./runtime/services/
ok  github.com/cosmos/cosmos-sdk/runtime/services

[greptile-apps]

PR author is not in the allowed authors list.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.02%. Comparing base (8f265eb) to head (a38dfe3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #26820      +/-   ##
==========================================
+ Coverage   64.97%   65.02%   +0.04%     
==========================================
  Files         785      785              
  Lines       55413    55425      +12     
==========================================
+ Hits        36007    36038      +31     
+ Misses      19406    19387      -19     

Files with missing lines	Coverage Δ
runtime/services/autocli.go	68.65% <100.00%> (+21.38%)	⬆️

... and 5 files with indirect coverage changes

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