feat: improve egctl collect

[zirain]

1. support collect other namespace for GNM(gateway namesapce mode)
2. mute klog
3. correct prometheus scrape logic

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 80 lines in your changes missing coverage. Please review.

Project coverage is 70.52%. Comparing base (cbb5381) to head (35d4553).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/troubleshoot/collect.go	0.00%	33 Missing ⚠️
...nternal/troubleshoot/collect/prometheus_metrics.go	0.00%	30 Missing ⚠️
internal/cmd/egctl/collect.go	0.00%	12 Missing ⚠️
internal/cmd/egctl/root.go	0.00%	2 Missing ⚠️
internal/utils/str/strconv.go	0.00%	2 Missing ⚠️
internal/troubleshoot/collect/config_dump.go	0.00%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (60.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6197      +/-   ##
==========================================
- Coverage   70.61%   70.52%   -0.10%     
==========================================
  Files         219      220       +1     
  Lines       36515    36526      +11     
==========================================
- Hits        25786    25760      -26     
- Misses       9201     9239      +38     
+ Partials     1528     1527       -1     

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[arkodg]

LGTM thanks