[jdk17u-dev] RFR: 8283929: GHA: Add RISC-V build config [v2]

[Feilong Jiang]

> Hi,
> I would like to backport [JDK-8283929](https://bugs.openjdk.org/browse/JDK-8283929) to enable cross-compiling for linux-riscv64 on jdk17u-dev, as #1427 has integrated.
> 
> The backport is not clean:
> 1. jdk17u-dev CI uses Ubuntu focal (20.04) which doesn't have up-to-date debian-ports-archive keyring [1], so I removed the `debian-ports-archive-keyring` installing and settings.
> 2. The `debian-version` still uses buster instead of bullseye.
> 
> 
> Changes tested with GHA on my personal branch and passed the cross-compiling for linux-riscv64 [2].
> 
> 
> 
> [1]. https://bugs.launchpad.net/ubuntu/+source/debian-ports-archive-keyring/+bug/1969202
> [2]. https://github.com/feilongjiang/jdk17u-dev/actions/runs/5508731228/jobs/10041643179

Feilong Jiang has updated the pull request incrementally with one additional commit since the last revision:

  keep debian-verison with buster

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1562/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1562/files/9d8df6ba..31ab9894

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1562&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1562&range=00-01

  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1562.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1562/head:pull/1562

PR: https://git.openjdk.org/jdk17u-dev/pull/1562