fix(kaniko): resolve blocking on Ctrl+C during Docker context creation

[idsulik]

Description

This commit resolves a deadlock issue in Skaffold where sending a Ctrl+C interrupt during the Docker context creation process, specifically while executing tw.WriteHeader(header) in pkg/skaffold/util/tar.go, would cause an indefinite block. The solution implemented adds a select statement to handle the context cancellation, allowing the process to exit gracefully.

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User facing changes

Before: Previously, when a user pressed Ctrl+C during the Docker context creation with Kaniko, Skaffold would block indefinitely, requiring manual termination of the process.

After: With the fix, Skaffold now responds to Ctrl+C interrupts promptly during the Docker context creation, terminating the process gracefully and avoiding a deadlock.

[idsulik]

the bug also happens when you try to call Ctrl + C on kaniko build retry:

As you can see on the screen, I tried to close the process, but it didn't respond me, I had to kill it

p.s. the build context failed because of timeout, fix is here #9267

[codecov]

Codecov Report

Attention: 295 lines in your changes are missing coverage. Please review.

Comparison is base (290280e) 70.48% compared to head (df063fd) 63.56%.
Report is 1103 commits behind head on main.

Files	Patch %	Lines
cmd/skaffold/app/cmd/exec.go	16.32%	40 Missing and 1 partial ⚠️
cmd/skaffold/app/cmd/filter.go	47.27%	22 Missing and 7 partials ⚠️
cmd/skaffold/app/cmd/lsp.go	28.12%	23 Missing ⚠️
cmd/skaffold/app/cmd/verify.go	23.33%	23 Missing ⚠️
cmd/skaffold/app/cmd/fix.go	51.16%	17 Missing and 4 partials ⚠️
cmd/skaffold/app/cmd/inspect_job_manifest_paths.go	60.00%	15 Missing and 1 partial ⚠️
cmd/skaffold/app/cmd/inspect_namespaces.go	50.00%	13 Missing and 1 partial ⚠️
...md/skaffold/app/cmd/inspect_config_dependencies.go	45.83%	12 Missing and 1 partial ⚠️
cmd/skaffold/app/cmd/lint.go	42.85%	12 Missing ⚠️
cmd/skaffold/app/cmd/inspect_build_env.go	60.71%	11 Missing ⚠️
... and 21 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9269      +/-   ##
==========================================
- Coverage   70.48%   63.56%   -6.92%     
==========================================
  Files         515      634     +119     
  Lines       23150    32712    +9562     
==========================================
+ Hits        16317    20794    +4477     
- Misses       5776    10315    +4539     
- Partials     1057     1603     +546     

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