fix: hotswap is not discoverable via telemetry

[kaizencc]

Adds a new HOTSWAP telemetry event type that fires when hotswap deployments are attempted, tracking success/failure state and resource change counts. The motivation behind this is to track hotswap efficiency.

For example,

{
  "event": {
    "state": "FAILED",
    "eventType": "HOTSWAP",
    "duration": 456,
    "error": {
      "name": "UnknownError"
    },
    "counters": {
      "hotswapped": 0,
      "hotswappableChanges": 1,
      "nonHotswappableChanges": 0
    }
  }
}

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[codecov-commenter]

Codecov Report

❌ Patch coverage is 96.29630% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 87.95%. Comparing base (ae037f9) to head (4222bb6).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/aws-cdk/lib/cli/io-host/cli-io-host.ts	96.15%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1230   +/-   ##
=======================================
  Coverage   87.94%   87.95%           
=======================================
  Files          74       74           
  Lines       10339    10364   +25     
  Branches     1377     1386    +9     
=======================================
+ Hits         9093     9116   +23     
- Misses       1220     1222    +2     
  Partials       26       26           

Flag	Coverage Δ
suite.unit	87.95% <96.29%> (+<0.01%)	⬆️

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