[riscv-port-jdk11u:riscv-port] RFR: 8339548: GHA: RISC-V: Use Debian snapshot archive for bootstrap

[Fei Yang]

On Tue, 10 Sep 2024 00:53:12 GMT, Gui Cao <gcao at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [9e0ccb8b](https://github.com/openjdk/jdk/commit/9e0ccb8bbd01ffbac466288977a770dd09e357af) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Fei Yang on 6 Sep 2024 and was reviewed by Aleksey Shipilev and Erik Joelsson.
> 
> Thanks!
> 
> Testing:
> 
>  - [ ] GHA linux-cross-build job

Marked as reviewed by fyang (Lead).

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PR Review: https://git.openjdk.org/riscv-port-jdk11u/pull/28#pullrequestreview-2291222118