RPM on downloads page

[stockholmux]

Is your feature request related to a problem? Please describe.
Downloads page for version 1.3.2 (and forward) will need to support RPM for:

• OpenSearch (bundle)
• OpenSearch Dashboard (bundle)

Describe the solution you'd like

For platform Linux

Add additional package type RPM and yum

This will result in the "Package" dropdown adding:

• x64 / RPM - downloadable file, link to documentation
• x64 / yum - link to yum page, link to documentation
• arm64 / RPM - downloadable file, link to documentation
• arm64 / yum - link to yum page, link to documentation

Note: Whilst the artifact itself may not be distinct on different architectures, the download page is explicit about architecture support to give a positive indication of support and non-support (e.g. by providing an option for x64 and arm64 but not x86, we're being clear what is supported and what is not).

Describe alternatives you've considered
None yet.

Additional context
opensearch-project/opensearch-build#1550

[stockholmux]

@peterzhuamazon Can you confirm that this matches up with the artifacts?

[stockholmux]

Dependent on #776