fix(i18n): resolve missing keys and localize max upstream connection placeholder

[Tusharjamdade]

Thank you for contributing to Harbor!

Comprehensive Summary of your change

Addresses i18n issues in the max upstream connection configuration by adding missing translations and replacing a hardcoded placeholder.

Issue being fixed

Fixes #22677

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• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
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• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[bupd]

@Tusharjamdade Thanks for your contribution,

Please update with the suggested changes.

[Tusharjamdade]

Hi @bupd, I’ve updated the changes as per the review. Please take a look.

[bupd]

as requested, update for all i18n keys.

Thanks

[bupd]

Suggested change

	"PROXY_CACHE_MAX_UPSTREAM_CONN_TIP": "Maximum number of concurrent connections to the upstream server",
	"PROXY_CACHE_MAX_UPSTREAM_CONN_TIP": "The max connection to the upstream registry for this proxy cache project, if -1, then there is no limit",

update for the i18n files

[bupd]

Suggested change

	"PROXY_CACHE_MAX_UPSTREAM_CONN_PLACEHOLDER": "Enter upstream connection limit"
	"PROXY_CACHE_MAX_UPSTREAM_CONN_PLACEHOLDER": "Please enter -1 or an integer greater than 0."

update for all the i18n files

[reasonerjt]

Do you need to put English messages to non-English locale files?

[reasonerjt]

@bupd could you double check?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.54%. Comparing base (c8c11b4) to head (04dfe6c).
⚠️ Report is 611 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #22684       +/-   ##
===========================================
+ Coverage   45.36%   68.54%   +23.17%     
===========================================
  Files         244      821      +577     
  Lines       13333   101822    +88489     
  Branches     2719        0     -2719     
===========================================
+ Hits         6049    69797    +63748     
- Misses       6983    28144    +21161     
- Partials      301     3881     +3580     

Flag	Coverage Δ
unittests	68.54% <ø> (+23.17%)	⬆️

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