Load rules and symbols previously part of Bazel from @rules_repos

### Description of the feature request:

Once the Starlarkified rules are remove from Bazel all the users should load them from @rules_repos. This might create problems, because the migration is long and tedious.

To make it easier Bazel should initially automatically load the rules and symbols without user intervention.

### Which category does this issue belong to?

Rules API

### What underlying problem are you trying to solve with this feature?

Make the migration easier.

### Which operating system are you running Bazel on?

_No response_

### What is the output of `bazel info release`?

_No response_

### If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.

_No response_

### What's the output of `git remote get-url origin; git rev-parse HEAD` ?

_No response_

### Have you found anything relevant by searching the web?

_No response_

### Any other information, logs, or outputs that you want to share?

_No response_

No files or tests are named. Start by identifying the Starlarkified rules and symbols previously provided by Bazel and the existing @rules_repos loading path. Done means Bazel automatically resolves those rules and symbols during the migration without user changes, with compatibility behavior covered by tests.

Written by the indexing model from the issue text.