Create and use a config/section parameter for release versions for each language + collector

[chalin]

For example, #1193 manually updates the OTel-Java release version. The version number for the collector and each language should be provided as a parameter from either:

• Site config
• Section front matter
• Or a data file.

Tasks:

• [x] #2259

Related:

• https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/19175
• Consider reverting #1469
  • @trask's ok - https://github.com/open-telemetry/opentelemetry.io/pull/1469#issuecomment-1162318594

• 1468

  • https://github.com/open-telemetry/opentelemetry.io/pull/1277#discussion_r911253540

[chalin]

We might even want to tie it into the git-submodule version that is fetched, though that could be handled via a separate PR