Add proxy configuration to tkrSourceControllerPackage when creating MC

[lubronzhan]

What this PR does / why we need it

CLI is not injecting proxy settings to tkrSourceControllerPackage, causing it failing to pull images

Which issue(s) this PR fixes

Fixes ##3754

Describe testing done for PR

Release note

Add proxy configuration to tkrSourceControllerPackage when creating MC

Additional information

Special notes for your reviewer

[github-actions]

Cluster Generation A/B Results:
https://storage.googleapis.com/tkg-clustergen/3751/20221025231609/clustergen.diff.txt
Author/reviewers:
Please review to verify that the effects on the generated cluster configurations are exactly what the PR intended, and give a thumbs-up if so.

[codecov]

Codecov Report

Merging #3751 (a18bbe0) into main (a72b141) will decrease coverage by 0.56%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #3751      +/-   ##
==========================================
- Coverage   46.24%   45.67%   -0.57%     
==========================================
  Files         400      425      +25     
  Lines       39642    41292    +1650     
==========================================
+ Hits        18331    18860     +529     
- Misses      19623    20720    +1097     
- Partials     1688     1712      +24     

Impacted Files	Coverage Δ
tkg/managementcomponents/helper.go	94.11% <100.00%> (+2.01%)	⬆️
addons/controllers/machine_controller.go	65.65% <0.00%> (-3.04%)	⬇️
...ons/controllers/packageinstallstatus_controller.go	77.99% <0.00%> (-1.16%)	⬇️
addons/controllers/clusterbootstrap_controller.go	63.04% <0.00%> (-0.81%)	⬇️
tkg/client/init.go	0.00% <0.00%> (ø)
tkg/tkgconfigproviders/helper.go	100.00% <0.00%> (ø)
capabilities/client/pkg/discovery/fake.go	100.00% <0.00%> (ø)
tkg/client/upgrade_cluster_clusterclass.go	100.00% <0.00%> (ø)
cmd/cli/plugin/cluster/osimage.go	100.00% <0.00%> (ø)
...md/cli/plugin/cluster/delete_machinehealthcheck.go	19.23% <0.00%> (ø)
... and 32 more

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[imikushin]

LGTM