feat(dependenciesdistributor): remove dependenciesdistributor concurrentreconciles

[CharlesQQ]

What type of PR is this?
/kind feature

What this PR does / why we need it:
set concurrentreconciles for dependencies-distributor controller, which previously was a fixed value of 2;
value same as --concurrent-resourcebinding-syncs flag.

Which issue(s) this PR fixes:
part of #5790

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.33%. Comparing base (8691287) to head (fd9cd89).

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5863      +/-   ##
==========================================
+ Coverage   46.32%   46.33%   +0.01%     
==========================================
  Files         661      661              
  Lines       54400    54400              
==========================================
+ Hits        25200    25207       +7     
+ Misses      27576    27570       -6     
+ Partials     1624     1623       -1     

Flag	Coverage Δ
unittests	46.33% <ø> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[RainbowMango]

/lgtm
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [RainbowMango]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment