fix(orchestration): execution fails when package not available in NPM (#1760)

Ignore 'jsii-docgen.NpmError.ETARGET' error after retries fail.


Motivated by an execution failure:

```json
{
  "cause": {
    "message": "Command \"npm install \"/tmp/packages-ynuuej/package.tgz\" --ignore-scripts --no-audit --no-bin-links --no-package-lock --json --include=dev --include=peer --include=optional --save\" exited with code 1: No matching version found for @aws-mdaa/naming@^1.0.20250708164847.\nIn most cases you or one of your dependencies are requesting\na package version that doesn't exist.",
    "name": "jsii-docgen.NpmError.ETARGET",
    "stack": "jsii-docgen.NpmError.ETARGET: Command \"npm install \"/tmp/packages-ynuuej/package.tgz\" --ignore-scripts --no-audit --no-bin-links --no-package-lock --json --include=dev --include=peer --include=optional --save\" exited with code 1: No matching version found for @aws-mdaa/naming@^1.0.20250708164847.\nIn most cases you or one of your dependencies are requesting\na package version that doesn't exist.\n    at assertSuccess (/node_modules/jsii-docgen/src/docgen/view/_npm.ts:302:13)\n    at Npm.install (/node_modules/jsii-docgen/src/docgen/view/_npm.ts:51:7)\n    at async Function.forPackage (/node_modules/jsii-docgen/src/docgen/view/documentation.ts:145:18)\n    at async <anonymous> (/src/backend/transliterator/transliterator.ecstask.ts:214:20)\n    at async ensureWritableHome (/src/backend/transliterator/transliterator.ecstask.ts:441:12)\n    at async handler (/src/backend/transliterator/transliterator.ecstask.ts:67:18)\n    at async main (/src/backend/transliterator/transliterator.ecs-entrypoint.ts:59:20)"
  },
  "error": "jsii-docgen.NpmError.ETARGET",
  "resource": "runTask.waitForTaskToken",
  "resourceType": "ecs"
}
```

The root cause is that `@aws-mdaa/[email protected]` depends
on `@aws-mdaa/[email protected]`, and the latter does not exist
in NPM.

----

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

---------

Signed-off-by: github-actions <[email protected]>
Co-authored-by: github-actions <[email protected]>

Author: iankhou