chore(dev): Bump down zstd-sys from 2.0.10 to 2.0.9 (#20369)

* chore(dev): Bump down zstd-sys from 2.0.10 to 2.0.9

To fix a WASM build issue. We can upgrade again once https://github.com/gyscos/zstd-rs/pull/274 is
merged and released (or https://github.com/gyscos/zstd-rs/issues/271 is otherwise fixed).

Also add a test that builds the playground to catch this sort of regression in the future.

Signed-off-by: Jesse Szwedko <jesse.szwedko@datadoghq.com>

* Revert "chore(deps): Bump the zstd group with 1 update (#20199)"

This reverts commit 0599d60758386b631533adce250b4820f5434e59.

Signed-off-by: Jesse Szwedko <jesse.szwedko@datadoghq.com>

* chmod +x

Signed-off-by: Jesse Szwedko <jesse.szwedko@datadoghq.com>

* Just put directly in env prepare

Signed-off-by: Jesse Szwedko <jesse.szwedko@datadoghq.com>

* Bump timeout

Signed-off-by: Jesse Szwedko <jesse.szwedko@datadoghq.com>

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Signed-off-by: Jesse Szwedko <jesse.szwedko@datadoghq.com>