RFR: 8224228: No way to locally suppress lint warnings in parser/tokenizer or preview features [v4]

[Archie Cobbs]

> This PR updates the `DeferredLintHandler` so that deferred warnings can be registered during parsing, before any `JCTree` nodes have been created, and it uses this new capability to update the `"preview"` and `"text-blocks"` Lint warnings so that they can be suppressed via `@SuppressWarnings` annotations. More details are provided in additional comments.

Archie Cobbs has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 12 commits:

 - Merge branch 'master' into JDK-8224228 to fix conflict.
 - Put back required flushing of binding pattern variable declaration.
 - Remove Attr.flushDeferredLintHandler() which doesn't appear necessary.
 - Merge branch 'JDK-8348427' into JDK-8224228
 - Refactor the DeferredLintHandler API to maintain the "stack" itself.
 - Add Javadoc to document a subtley in the API.
 - Update DeferredLintHandler API to use JCTree instead of DiagnosticPosition.
 - Fixes and cleanups.
 - Merge branch 'master' into JDK-8224228
 - Bug fixes.
 - ... and 2 more: https://git.openjdk.org/jdk/compare/907350e9...03f08d96

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Changes: https://git.openjdk.org/jdk/pull/23237/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23237&range=03
  Stats: 727 lines in 22 files changed: 503 ins; 41 del; 183 mod
  Patch: https://git.openjdk.org/jdk/pull/23237.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23237/head:pull/23237

PR: https://git.openjdk.org/jdk/pull/23237