Update codegen image

[khanhtc1202]

What this PR does:

Update codegen container image to use the image with go version v1.26.2

Why we need it:

Which issue(s) this PR fixes:

Follow PR #6711

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 29.37%. Comparing base (0d71fd0) to head (ac3615a).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6884      +/-   ##
==========================================
- Coverage   29.38%   29.37%   -0.01%     
==========================================
  Files         601      597       -4     
  Lines       64278    64163     -115     
==========================================
- Hits        18886    18848      -38     
+ Misses      43924    43848      -76     
+ Partials     1468     1467       -1     

Flag	Coverage Δ
.	23.15% <ø> (ø)
.-pkg-app-pipedv1-plugin-analysis	32.43% <ø> (ø)
.-pkg-app-pipedv1-plugin-ecs	31.74% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes	58.37% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	59.66% <ø> (ø)
.-pkg-app-pipedv1-plugin-scriptrun	54.83% <ø> (ø)
.-pkg-app-pipedv1-plugin-terraform	38.18% <ø> (ø)
.-pkg-app-pipedv1-plugin-wait	?
.-pkg-app-pipedv1-plugin-waitapproval	52.71% <ø> (ø)
.-pkg-plugin-sdk	50.34% <ø> (ø)
.-tool-actions-gh-release	19.23% <ø> (ø)
.-tool-actions-plan-preview	25.51% <ø> (ø)
.-tool-codegen-protoc-gen-auth	0.00% <ø> (ø)

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