fix(cmd/celestia): Split subcommands into full subcommands and auxiliary

[renaynay]

All subcommands were inheriting the same flagsets + parsing logic even though 4/6 subcommands only need access to --node.store and --p2p.network.

This splits logic such that only the necessary flags + parsing logic are added to auxiliary subcommands.

This also resolves #4063

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 8.24742% with 89 lines in your changes missing coverage. Please review.

Project coverage is 45.05%. Comparing base (2469e7a) to head (661e7ab).
Report is 443 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/node.go	0.00%	22 Missing ⚠️
cmd/util.go	0.00%	20 Missing ⚠️
cmd/flags_node.go	0.00%	15 Missing ⚠️
nodebuilder/p2p/flags.go	0.00%	15 Missing ⚠️
cmd/config.go	0.00%	6 Missing ⚠️
cmd/init.go	0.00%	4 Missing ⚠️
cmd/auth.go	0.00%	3 Missing ⚠️
cmd/reset_store.go	0.00%	3 Missing ⚠️
cmd/start.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4131      +/-   ##
==========================================
+ Coverage   44.83%   45.05%   +0.21%     
==========================================
  Files         265      308      +43     
  Lines       14620    22571    +7951     
==========================================
+ Hits         6555    10169    +3614     
- Misses       7313    11313    +4000     
- Partials      752     1089     +337     

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