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:

• Make collectorVersion available to entire Collector section #2259

Related:

• Move README status table to separate machine-readable file opentelemetry-collector-contrib#19175
• Consider reverting Use 'latest' url to download java agent. #1469
  • @trask's ok - Use 'latest' url to download java agent. #1469 (comment)
• Bump collector version to 0.53.0 #1468
  • Adding a "HOW-TO: Building your own collector" tutorial to the collector #1277 (comment)

[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