tiproxyctl: change --curls to --host and --port

[djshow832]

What problem does this PR solve?

Issue Number: close #656

Problem Summary:
tiproxyctl --curls=127.0.0.1:3080
tidb-ctl --host=127.0.0.1 --port 10080
They are inconsistent.

What is changed and how it works:
Change tiproxyctl arguments from --curls to --host and --port

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Try bin/tiproxyctl --help and bin/tiproxyctl --host localhost --port 3080 config get

Notable changes

• Has configuration change
• Has HTTP API interfaces change
• Has tiproxyctl change
• Other user behavior changes

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

- Change tiproxyctl arguments from --curls to --host and --port

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@           Coverage Diff           @@
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  Coverage        ?   69.35%           
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  Files           ?       95           
  Lines           ?     9174           
  Branches        ?        0           
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  Hits            ?     6363           
  Misses          ?     2341           
  Partials        ?      470           

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: xhebox

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-11 07:43:33.953665312 +0000 UTC m=+428683.694089252: ☑️ agreed by xhebox.