Remove getContainerPackageInfo public api from container.ts

[MarioJGMsoft]

Description

With PR: #22849 we introduced a non-generic api into container-loader layer which we should remove.
Since it is public, we will first mark it as deprecated, and then in the next release remove it. Make sure we inform Loop to not take dependency on it.

This is the follow up task to make sure that the api gets eliminated properly.

Reviewer Guidance
Please let me know if there is anything I should keep in mind while doing this work

Fixes: AB#31203

[github-actions]

🔗 Found some broken links! 💔

Run a link check locally to find them. See
https://github.com/microsoft/FluidFramework/wiki/Checking-for-broken-links-in-the-documentation for more information.

linkcheck output

> fluid-framework-docs-site@0.0.0 ci:check-links /home/runner/work/FluidFramework/FluidFramework/docs
> start-server-and-test "npm run serve -- --no-open" 3000 check-links

1: starting server using command "npm run serve -- --no-open"
and when url "[ 'http://127.0.0.1:3000' ]" is responding with HTTP status code 200
running tests using command "npm run check-links"


> fluid-framework-docs-site@0.0.0 serve
> docusaurus serve --no-open

[SUCCESS] Serving "build" directory at: http://localhost:3000/

> fluid-framework-docs-site@0.0.0 check-links
> linkcheck http://localhost:3000 --skip-file skipped-urls.txt

Crawling...

http://localhost:3000/docs/data-structures/tree
- (36:97) 'the Shar..' => http://localhost:3000/docs/api/tree (HTTP 404)

http://localhost:3000/docs/data-structures/tree/
- (36:97) 'the Shar..' => http://localhost:3000/docs/api/tree (HTTP 404)

http://localhost:3000/docs/data-structures/tree/schema-definition
- (30:128) 'SharedTr..' => http://localhost:3000/docs/api/tree (HTTP 404)

http://localhost:3000/docs/start/tree-start
- (44:4) 'the API ..' => http://localhost:3000/docs/api/tree/schemafactory-class (HTTP 404)
- (61:7) 'the API' => http://localhost:3000/docs/api/tree/treechangeevents-interface (HTTP 404)


Stats:
  158264 links
    1304 destination URLs
    1535 URLs ignored
       0 warnings
       3 errors

 ELIFECYCLE  Command failed with exit code 1.