disable the iptables setting of yurthub component by default

[rambohe-ch]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
/kind question
/kind design
/sig ai
/sig iot
/sig network
/sig storage

/kind enhancement

What this PR does / why we need it:

disable iptables setting of Yurthub component by default, and we will remove iptables setting in the future. this means we will remove parameter --enable-iptables of yurthub.

the reason as following:

We originally expected that these iptables configurations would help clients in the container network to have access to yurthub's dummy interface, but in fact many situations prevented yurthub from running and caused confusion for users. At the same time, we found that without these iptables configurations, clients in the container network can still access the yurthub's dummy interface, so removing these configurations would be a better choice.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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In response to this:

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
/kind question
/kind design
/sig ai
/sig iot
/sig network
/sig storage

/kind enhancement

What this PR does / why we need it:

disable iptables setting of Yurthub component by default, and we will remove iptables setting in the future. this means we will remove parameter --enable-iptables of yurthub.

the reason as following:

We originally expected that these iptables configurations would help clients in the container network to have access to yurthub's dummy interface, but in fact many situations prevented yurthub from running and caused confusion for users. At the same time, we found that without these iptables configurations, clients in the container network can still access the yurthub's dummy interface, so removing these configurations would be a better choice.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
1.1% Duplication

[codecov]

Codecov Report

Merging #1770 (f80318e) into master (acf9b01) will decrease coverage by 0.02%.
Report is 1 commits behind head on master.
The diff coverage is 26.77%.

@@            Coverage Diff             @@
##           master    #1770      +/-   ##
==========================================
- Coverage   52.21%   52.19%   -0.02%     
==========================================
  Files         172      172              
  Lines       20877    20884       +7     
==========================================
+ Hits        10900    10901       +1     
- Misses       9015     9021       +6     
  Partials      962      962              

Flag	Coverage Δ
unittests	52.19% <26.77%> (-0.02%)	⬇️

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

Files	Coverage Δ
cmd/yurthub/app/options/options.go	94.85% <100.00%> (+0.02%)	⬆️
pkg/yurthub/network/dummyif_linux.go	0.00% <ø> (ø)
...nager/controller/raven/dns/dns_enqueue_handlers.go	41.37% <100.00%> (ø)
pkg/yurthub/certificate/manager/manager.go	75.71% <0.00%> (-3.40%)	⬇️
pkg/yurthub/network/network.go	0.00% <0.00%> (ø)
...rnalservice/gateway_internal_service_controller.go	48.14% <33.33%> (ø)
...r/raven/gatewaypickup/gateway_pickup_controller.go	24.89% <12.50%> (ø)
...n/gatewaypickup/gateway_pickup_enqueue_handlers.go	0.00% <0.00%> (ø)
...yurtmanager/controller/raven/dns/dns_controller.go	29.87% <25.00%> (ø)
...publicservice/gateway_public_service_controller.go	39.14% <50.00%> (ø)
... and 2 more

[YTGhost]

/lgtm

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rambohe-ch, YTGhost

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