RFR: JDK-8318566: Heap walking functions should not use FilteredFieldStream [v2]

[Alex Menkov]

> FilteredFieldStream used by heap walking functions to iterate through klass/superclasses/interfaces fields are known to have poor performance (see [JDK-8317692](https://bugs.openjdk.org/browse/JDK-8317692) for details).
> Heap walking API implementation is the last user of the klasses.
> The fix reworks iteration through klass/superclasses/interfaces fields and drops FilteredFieldStream-related code.
> Additionally removed/updated includes of reflectionUtils.hpp.
> 
> Testing:
>   - tier1..4;
>   - test/hotspot/jtreg/vmTestbase/nsk/jvmti (contains tests for different heap walking functions);
>   - new test from #17580 (now the test runs several times faster).

Alex Menkov has updated the pull request incrementally with one additional commit since the last revision:

  remove recursion

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17661/files
  - new: https://git.openjdk.org/jdk/pull/17661/files/5edae77e..c064abdf

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17661&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17661&range=00-01

  Stats: 43 lines in 1 file changed: 18 ins; 23 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/17661.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17661/head:pull/17661

PR: https://git.openjdk.org/jdk/pull/17661