Generate ICU4X artifacts on tagging

[mosuem]

Generate a new release whenever intl4x is released.

cc @robertbastian

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[github-actions]

PR Health

Breaking changes ✔️

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Package	Change	Current Version	New Version	Needed Version	Looking good?

Changelog Entry ✔️

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Package	Changed Files

Changes to files need to be accounted for in their respective changelogs.

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The following packages contain symbols visible in the public API, but not exported by the library. Export these symbols or remove them from your publicly visible API.

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// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

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Package publish validation ✔️

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Package	Version	Status
package:intl	0.20.0-wip	WIP (no publish necessary)
package:intl4x	0.8.2	already published at pub.dev
package:intl_translation	0.20.0-wip	WIP (no publish necessary)
package:messages	0.2.0	already published at pub.dev
package:messages_builder	0.2.1	already published at pub.dev
package:messages_serializer	0.2.1	already published at pub.dev
package:messages_shrinker	0.2.2-wip	WIP (no publish necessary)

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

[mosuem]

The generation seems to fail on my test repo
https://github.com/mosuem/generate_icu4x_binaries/actions/runs/8643427617 for target linux_ia32. Is this expected @robertbastian ?

[robertbastian]

Yes, I need to investigate how to get the 32 bit libraries. I'd disable it for now.

[robertbastian]

Successful run: https://github.com/dart-lang/i18n/actions/runs/8754939089

[robertbastian]

New successful run: https://github.com/dart-lang/i18n/actions/runs/8756029070