RFR: 8311102: Write annotations in the classfile dumped by SA

[Ashutosh Mehra]

Please review this PR that enables ClassWriter to write annotations to the class file being dumped.

The fields annotations are stored in `Annotations::_fields_annotations` which is of type `Array<Array<u1>*>`. There is no class in SA that can represent it. I have added ArrayOfU1Array to correspond to the type `Array<Array<u1>*>` and it works. I believe there are better approaches but that would require a bit more refactoring of the classes representing Array types. I will leave that for future work for now.

Testing: `test/hotspot/jtreg/serviceability/sa` and `test/jdk/sun/tools/jhsdb`
Tested it manually by dumping j.l.String class and comparing the annotations with the original class using javap.
The test case mentioned in [JDK-8311101](https://bugs.openjdk.org/browse/JDK-8311101) would provide better coverage.

-------------

Commit messages:
 - 8311102: Write annotations in the classfile dumped by SA

Changes: https://git.openjdk.org/jdk/pull/14735/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14735&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8311102
  Stats: 379 lines in 9 files changed: 376 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/14735.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14735/head:pull/14735

PR: https://git.openjdk.org/jdk/pull/14735