Support Temurin on Linux RISC-V (#1269)

* Document Temurin RISC-V compatibility

Co-Authored-By: multicode <[email protected]>

* Expose RISC-V as a canonical architecture

Co-Authored-By: multicode <[email protected]>

* Support Temurin on Linux RISC-V

Co-Authored-By: multicode <[email protected]>

* Address RISC-V review feedback

Co-Authored-By: multicode <[email protected]>

* Fix casing for RISC-V architecture in tests

Co-authored-by: Copilot Autofix powered by AI <[email protected]>

* Update __tests__/java-platform-contract.test.ts

---------

Co-authored-by: multicode <[email protected]>
Co-authored-by: Copilot Autofix powered by AI <[email protected]>

__tests__/distributors/temurin-installer.test.ts

@@ -293,7 +293,8 @@ describe('getAvailableVersions', () => {
   it.each([
     ['amd64', 'x64'],
     ['arm', 'arm'],
-    ['arm64', 'aarch64']
+    ['arm64', 'aarch64'],
+    ['riscv64', 'riscv64']
   ])(
     'defaults to os.arch(): %s mapped to distro arch: %s',
     async (osArch: string, distroArch: string) => {