[8.12] [Fleet] Cache call to getBundledPackages (#172640)

[kibanamachine]

Backport

This will backport the following commits from main to 8.12:

• [Fleet] Cache call to getBundledPackages (#172640)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[elasticmachine]

Pinging @elastic/apm-ui (Team:APM)

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: a177d6e

Failed CI Steps

• Detection Engine - Security Solution Cypress Tests #6
• APM Cypress Tests #4

Test Failures

• [job] [logs] Detection Engine - Security Solution Cypress Tests #6 / Alert user assignment - ESS & Serverless Updating assignees (single alert) adding new assignees via More actions in alerts table adding new assignees via More actions in alerts table

Metrics [docs]

✅ unchanged

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @nchaulet