feat: Add automatic memory limit handling

[dongjiang1989]

What type of PR is this?

What this PR does / why we need it:

Enable automatic detection of memory limits and configure GOMEMLIMIT to match.Also includes a flag to allow controlling the reserved ratio.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Add automatic memory limit handling

[karmada-bot]

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[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 33.33333% with 38 lines in your changes missing coverage. Please review.

Project coverage is 48.35%. Comparing base (ce41488) to head (70a075a).

Files with missing lines	Patch %	Lines
cmd/aggregated-apiserver/app/options/options.go	0.00%	5 Missing ⚠️
cmd/metrics-adapter/app/options/options.go	0.00%	3 Missing ⚠️
operator/cmd/operator/app/options/options.go	0.00%	3 Missing ⚠️
pkg/goruntime/memory.go	85.71%	2 Missing and 1 partial ⚠️
cmd/agent/app/agent.go	0.00%	2 Missing ⚠️
cmd/controller-manager/app/controllermanager.go	0.00%	2 Missing ⚠️
cmd/descheduler/app/descheduler.go	0.00%	2 Missing ⚠️
cmd/karmada-search/app/karmada-search.go	0.00%	2 Missing ⚠️
cmd/scheduler-estimator/app/options/options.go	0.00%	2 Missing ⚠️
cmd/scheduler-estimator/app/scheduler-estimator.go	0.00%	2 Missing ⚠️
... and 8 more

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6059      +/-   ##
==========================================
- Coverage   48.36%   48.35%   -0.02%     
==========================================
  Files         666      667       +1     
  Lines       54842    54898      +56     
==========================================
+ Hits        26527    26546      +19     
- Misses      26595    26631      +36     
- Partials     1720     1721       +1     

Flag	Coverage Δ
unittests	48.35% <33.33%> (-0.02%)	⬇️

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