WIP - Update web-terminal Docker image to 0.3

[xrstf]

What this PR does / why we need it: https://github.com/kubermatic/kubermatic/pull/11286 built a new image with a more recent kubectl binary on board. This PR makes sure the dashboard is making use of that the image.

What type of PR is this? /kind chore

Does this PR introduce a user-facing change? Then add your Release Note here:

NONE

Documentation:

NONE

[codecov[bot]]

Codecov Report

Merging #5193 (e718ec8) into main (2612fea) will decrease coverage by 0.37%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #5193      +/-   ##
==========================================
- Coverage   48.40%   48.03%   -0.38%     
==========================================
  Files         398      398              
  Lines       15227    15789     +562     
  Branches     2709     2914     +205     
==========================================
+ Hits         7371     7584     +213     
- Misses       7407     7715     +308     
- Partials      449      490      +41     

Impacted Files	Coverage Δ
src/app/core/services/provider/openstack.ts	40.00% <0.00%> (-10.00%)	:arrow_down:
src/app/node-data/dialog/component.ts	21.66% <0.00%> (-6.12%)	:arrow_down:
.../app/core/services/node-data/provider/openstack.ts	13.09% <0.00%> (-5.78%)	:arrow_down:
src/app/cluster/list/external-cluster/component.ts	52.58% <0.00%> (-2.90%)	:arrow_down:
src/app/core/services/external-cluster.ts	8.78% <0.00%> (-2.43%)	:arrow_down:
src/app/core/services/wizard/provider/openstack.ts	63.94% <0.00%> (-2.25%)	:arrow_down:
...rnal-cluster-credentials/provider/eks/component.ts	17.00% <0.00%> (-0.98%)	:arrow_down:
src/app/shared/validators/others.ts	100.00% <0.00%> (ø)
...tails/cluster/machine-deployment-list/component.ts	34.32% <0.00%> (+0.26%)	:arrow_up:
src/app/shared/entity/node.ts	19.79% <0.00%> (+1.37%)	:arrow_up:
... and 4 more

---

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[kubermatic-bot]

LGTM label has been added.

Git tree hash: 48ca724f357f20fdd745c4e5de444bf69f5bf01b

[kubermatic-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahmedwaleedmalik, xrstf

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• ~~pkg/handler/OWNERS~~ [ahmedwaleedmalik]

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[ahmedwaleedmalik]

/retest