Have typeIndex be an cp index to descriptor of the enum type in EnumAnnotationValue

[vootelerotov]

Previously, typeIndex was an index to internal name of the enum type.
This does ahdere to JVMS.

Relevant snippets from JVMS:
type_name_index
The constant_pool entry at that index must be a CONSTANT_Utf8_info
structure (§4.4.7) representing a field descriptor (§4.3.2).

https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.16.1

The issue causes IllegalArgumentException when reading generated classes with ASM 6.1.1.

[Ladicek]

I looked at both JDK 8 and JDK 11 and they have a special case in AnnotationParser.parseEnumValue:

        if (!typeName.endsWith(";")) {
            // support now-obsolete early jsr175-format class files.
            if (!enumType.getName().equals(typeName))
            return new AnnotationTypeMismatchExceptionProxy(
                typeName + "." + constName);
        } else ...

This is lost in JDK 17 with commit openjdk/jdk@8758b55

That makes this PR a must-have for JDK 17 support.

Additional references:

• 8265591: Remove vestiages of intermediate JSR 175 annotation format openjdk/jdk#3597
• https://bugs.openjdk.java.net/browse/JDK-8265591
• https://bugs.openjdk.java.net/browse/JDK-8265608

I have also built JBoss Class File Writer from master with this commit on top, then built Weld with the modified version of JBoss Class File Writer, and can confirm that a lot of tests in SmallRye Fault Tolerance that used to fail on JDK 17-ea now pass.