8356022: Migrate descriptor parsing from generics to BytecodeDescriptor

[liach]

As another step toward the removal of the old generics infrastructure, I propose to remove the usages of generic parsing utilities and use the facilities provided by BytecodeDescriptor, already used by MethodType.fromDescriptorString. This also prevents extra validation cost in use sites to defend against generic types.

In this patch, BytecodeDescriptor and Wrapper see minor updates, mainly for better exception messages - previously, an unparseable char in the descriptor string just reports that char, and now the whole descriptor string is reported.

These behaviors are already covered by the tests added in JDK-8350704 #23788.

Testing: reflect/annotation/Class, running tier 1+2

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8356022: Migrate descriptor parsing from generics to BytecodeDescriptor (Sub-task - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/24978/head:pull/24978
$ git checkout pull/24978

Update a local copy of the PR:
$ git checkout pull/24978
$ git pull https://git.openjdk.org/jdk.git pull/24978/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 24978

View PR using the GUI difftool:
$ git pr show -t 24978

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/24978.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back liach! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

@liach The following label will be automatically applied to this pull request:

• core-libs

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 00: Full (a0821e97)