Add JsonParser.willInternPropertyNames() for property name intern introspection (#1211)

[maxpaulus43]

Add ability to determine whether field name interning is enabled for a JsonParser instance, as suggested in GitHub issue #1211.

Changes

• Add JsonParser.willInternPropertyNames() with default returning false
• Add isInternStrings() accessor to ByteQuadsCanonicalizer and CharsToNameCanonicalizer symbol tables
• Override in UTF8StreamJsonParser, ReaderBasedJsonParser, UTF8DataInputJsonParser, and NonBlockingJsonParserBase to delegate to their respective symbol tables
• Override in JsonParserDelegate to delegate to wrapped parser
• Add comprehensive unit tests (InternFieldNamesTest) covering all parser types with various feature configurations
• Update DelegatesTest to verify delegation of new method
• Add release notes entry under 3.2.0

Closes #1211

[cowtowncoder]

Quick note on naming: instead of "Field" code uses "Property" for keys of JSON Objects in 3.0. So let's rename method(s).

EDIT: maybe rename as willInternPropertyNames()

[cowtowncoder]

Aside from naming (apologies, I should have updated the issue earlier), looks good.

One thing we'll need before merging is CLA (from https://github.com/FasterXML/jackson/blob/main/CLA-jackson-2026.pdf) if not yet sent (only needs to be done once, before merging the first contribution; one is good for all future contributions).
The easiest way is usually to print, sign, scan/photo, email to cla at fasterxml dot com.

Looking forward to merging this, thank you!

[maxpaulus43]

@cowtowncoder signed CLA and updated naming

[cowtowncoder]

Received CLA; hoping to merge later today.

[github-actions]

📈 Overall Code Coverage

Metric	Coverage	Change
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Branches	75.74%	📈 +0.010%

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