Issue 8344: constrain data path expose

[Lyndon-Li]

Fix #8344, add a mechanism to soothe creation of data mover pods for DataUpload, DataDownload, PodVolumeBackup and PodVolumeRestore

[codecov]

Codecov Report

Attention: Patch coverage is 57.73585% with 112 lines in your changes missing coverage. Please review.

Project coverage is 60.28%. Comparing base (4f06b6e) to head (454564a).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/exposer/vgdp_counter.go	32.66%	101 Missing ⚠️
pkg/cmd/cli/nodeagent/server.go	0.00%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9064      +/-   ##
==========================================
- Coverage   60.31%   60.28%   -0.04%     
==========================================
  Files         378      379       +1     
  Lines       42822    43066     +244     
==========================================
+ Hits        25830    25964     +134     
- Misses      15438    15548     +110     
  Partials     1554     1554              

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[kaovilai]

Configuration Validation: Add validation for PrepareQueueLength to ensure it's a
positive number
Documentation: The PR would benefit from:
- Documentation on how to configure PrepareQueueLength

[Lyndon-Li]

Configuration Validation: Add validation for PrepareQueueLength to ensure it's a positive number Documentation: The PR would benefit from: - Documentation on how to configure PrepareQueueLength

The validation is here:
if s.dataPathConfigs != nil && s.dataPathConfigs.LoadConcurrency != nil && s.dataPathConfigs.LoadConcurrency.PrepareQueueLength > 0.

Documentation will be in a separate PR after this one is merged.