RFR: 8331291: java.lang.classfile.Attributes class performs a lot of static initializations [v2]

[Adam Sotona]

> Hi,
> During performance optimization work on Class-File API as JDK lambda generator we found some static initialization killers.
> One of them is `java.lang.classfile.Attributes` with tens of static fields initialized with individual attribute mappers, and common set of all mappers, and static map from attribute names to the mappers.
> 
> I propose to turn all the static fields into lazy-initialized static methods and remove `PREDEFINED_ATTRIBUTES` and `standardAttribute(Utf8Entry name)` static mapping method from the `Attributes` API class.
>  
> Please let me know your comments or objections and please review the [PR](https://github.com/openjdk/jdk/pull/19006) and [CSR](https://bugs.openjdk.org/browse/JDK-8331414), so we can make it into 23.
> 
> Thank you,
> Adam

Adam Sotona has updated the pull request incrementally with one additional commit since the last revision:

  added bug number

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19006/files
  - new: https://git.openjdk.org/jdk/pull/19006/files/b7b35c5d..27238368

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19006&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19006&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/19006.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19006/head:pull/19006

PR: https://git.openjdk.org/jdk/pull/19006