Fine. Add RequirementsManifestDigest; stop caching linked bundles

Introduce a compact digest for requirements validation and remove the
process-wide in-memory cache of linked bundles. This reduces heap usage
and speeds the common "no-op" validation path without sacrificing
correctness.

What’s new
- Add `RequirementsManifestDigest`: a compact map from library `Uri` to
  `LibraryManifest.hashForRequirements`. It supports binary read/write and a
  fast `isSatisfied(LinkedElementFactory)` check.
- Add `RequirementsManifest.toDigest()` to build the digest directly from a
  manifest, including re-exported libraries.

Linking & caching changes
- Replace `LinkedBundleProvider` with a simple on-disk cache entry:
  `_LinkedBundleCacheEntry { nonTransitiveApiSignature, requirementsDigest,
  requirementsBytes, libraryManifests, linkedBytes }`.
- Persist both the digest (for fast checks) and the raw requirements bytes
  (to lazily deserialize for a full check only when needed).
- In `LibraryContext`, add `_probeLinkedBundle(...)`:
  - If fine-grained deps are off, any cache hit is reused (key already
    includes the transitive API signature).
  - If on, verify `nonTransitiveApiSignature`, then try the digest fast path.
    If the digest fails, fall back to `requirements.isSatisfied(...)`.
- Write/read cache entries directly to/from `ByteStore`; do not maintain an
  in-memory map of previously deserialized bundles.

Wiring cleanup
- Remove `LinkedBundleProvider` from `AnalysisContextCollectionImpl`,
  `ContextBuilderImpl`, `AnalysisDriver`, `LibraryContext`, and the micro
  resolver; adjust constructors and call sites accordingly.
- Drop state-printer output related to the removed provider.

Format bump
- Increment `AnalysisDriver.DATA_VERSION` to 567 to invalidate old cache
  data and reflect the new on-disk bundle format.

Why
- The prior in-memory provider retained requirements/manifests/linked bytes
  for many cycles, inflating heap in large workspaces and transitive edits.
- The digest enables a cheap, order-independent equality check that avoids
  deserializing `RequirementsManifest` in the overwhelmingly common case
  where nothing relevant changed.

Impact
- Lower peak memory (no process-wide bundle cache).
- Faster typical validation (digest check), with full checks only when
  hashes disagree or a library is missing.

Change-Id: I61d21cdffaa0b8e6ee1f87d0469c27b890061935
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/451960
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>